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# VIacoustics

Products and services for acoustic measurement

## Sitemaps

- [XML Sitemap](https://viacoustics.com/sitemap.xml): Contains all public & indexable URLs for this website.

## Posts

- [IPLA Pro - Impulsive Peak Level Attenuation Software](https://viacoustics.com/2023/06/ipla-pro-impulsive-peak-level-attenuation-software/)
- [Real Ear Attenuation at Threshold (REAT) system validated by the National Institute of Occupational Safety and Health (NIOSH)](https://viacoustics.com/2019/04/real-ear-attenuation-at-threshold-reat-system-validated-by-the-national-institute-of-occupational-safety-and-health-niosh/) - Report detailing the National Institute of Occupational Safety and Health (NIOSH) validation of our Real Ear Attenuation at Threshold (REAT) system.
- [Real Ear Attenuation at Threshold (REAT) system at NASA Auditory Demonstration Laboratory](https://viacoustics.com/2019/03/real-ear-attenuation-at-threshold-reat-system-at-nasa-auditory-demonstration-laboratory/) - The initial REAT system was developed for NASA partnered with National Instruments, GRAS Sound and Vibration, ETS-Lindgren, and our Trident and REATPro software.
- [IBM Uses Trident Software to Make Quieter Servers](https://viacoustics.com/2012/10/ibm-uses-trident-software-to-make-quieter-servers/) - This is one of several major laboratories that use our acoustic measurement systems and software. 
- [National Institute of Occupational Safety and Health uses Trident software to study smartphone sound level meter applications.](https://viacoustics.com/2019/04/national-institute-of-occupational-safety-and-health-uses-trident-software-to-study-smartphone-sound-level-meter-applications/) - Why can't I just use a sound level meter on my smartphone? This study performed by NIOSH answered that question using our Trident software.

## Pages

- [Home](https://viacoustics.com/) - Turnkey Systems for Acoustic Measurement Custom systems and software & personal installationyields immediate productivity We provide product noise and acoustic measurement systems and software to organizations whose needs range from those new to acoustics to accredited acoustics laboratories. Fully integrated turnkey systems include: Custom software for automation of standardized testing practices Installation, training, and support
- [Contact](https://viacoustics.com/contact-us/) - Thank you for your interest in VIacoustics. You can contact us by phone, by email, or by filling out the form below. Jeff G Schmitt, P.E., President PHONE: 888-402-9686 EMAIL: info@VIacoustics.com
- [About](https://viacoustics.com/about-us/) - VIacoustics was formed in August of 2001, with the mission of joining together a group of products and services to address the full range of needs for companies with product noise emission and acoustic measurement requirements. Since that time, we've installed systems in some of the top acoustic laboratories in the country and helped many
- [Our Customers](https://viacoustics.com/our-customers/) - VIacoustics provides product noise and acoustical measurement solutions to clientsacross a broad range of industries and applications. Industries We Support Hearing Protector Manufacturers Household Appliance Manufacturers Information Technology Equipment Product and Equipment Manufacturers Acoustic Material Manufacturers Automobile and Aircraft Manufacturers Medical Device Manufacturers Heating and Air Conditioning Equipment What Do You Need? Hardware/transducers for acoustic
- [Hardware/transducers for acoustic measurement](https://viacoustics.com/our-customers/hardware-transducers-for-acoustic-measurement/) - We provide products from these manufacturers and integrate them into custom measurement systems to provide you with turnkey solutions for your acoustic measurement needs.
- [Heating and Air Conditioning Equipment](https://viacoustics.com/our-customers/heating-and-air-conditioning-equipment/) - Are you a manufacturer of HVAC equipment and need to measure the sound power output of your products? We can tell you everything you need to know about setting up an acoustics laboratory, outfit said laboratory with all the gear you need, help put the lab together and teach you to start taking measurements! Let's
- [Automobile and Aircraft Manufacturing](https://viacoustics.com/our-customers/automobile-and-aircraft-manufacturing/) - Please contact us with any and all of your acoustic measurement problems!
- [Acoustic Material Manufacturers](https://viacoustics.com/our-customers/acoustic-material-manufacturers/) - Need to test the acoustic properties of materials you produce? We can supply you with all the information you need to set up your own acoustics laboratory.
- [Product and Equipment Manufacturers](https://viacoustics.com/our-customers/product-and-equipment-manufacturers/) - If your product makes sound and you need to measure or specify the level of that sound, then we have the systems and services to help you get started
- [Information Technology Equipment](https://viacoustics.com/our-customers/information-technology-equipment/) - We've been testing the noise emissions from computer and business equipment since the personal computer was invented.
- [Household Appliance Manufacturers](https://viacoustics.com/our-customers/household-appliance-manufacturers/) - To meet labeling, regulatory, and customer acceptance requirements household appliance manufacturers need to measure and control the noise emissions of their products.
- [Medical Device Manufacturers](https://viacoustics.com/our-customers/medical-device-manufacturers/) - Take a look at our Medical Alarm Analyzer System featuring our custom software.
- [VIacoustics + National Instruments  = Your B&K Pulse Alternative](https://viacoustics.com/pulse-alternative/) - VIacoustics and National Instruments provide a viable alternative to the Bruel and Kjaer Pulse, at a price most of us can afford.
- [Sound Level Measurement](https://viacoustics.com/sound-level-measurement/) - Does your product have a noise specification or requirement? Do you need to learn to measure basic sound pressure levels? We have systems to meet your needs.
- [Sound Absorption of Building Materials](https://viacoustics.com/our-customers/acoustic-material-manufacturers/sound-absorption-of-building-materials/) - Sound absorption is a measure of the sound energy that is not reflected back when it reaches a surface. Sound absorption is generally expressed as a single number rating, the Noise Reduction Coefficient (NRC) of the building material. Industry test standards ASTM C423 and ISO 354 are common methods for measuring the sound absorption of
- [Site Map](https://viacoustics.com/site-map/)
- [News & Updates](https://viacoustics.com/news/)
- [Sound Transmission Loss of Building Materials](https://viacoustics.com/our-customers/acoustic-material-manufacturers/sound-transmission-loss-of-building-materials/) - We can help you build your TA test facility from the ground up, outfit your existing chambers with instrumentation and software, and train you to use it.
- [Computers and Business Equipment](https://viacoustics.com/industries-that-we-support/computers-and-business-equipment/)
- [Hearing Protector Manufacturers](https://viacoustics.com/industries-that-we-support/hearing-protector-manufacturers/) - Complete testing systems for Real Ear Attenuation at Threshold (REAT), Microphone in Real Ear (MIRE), Impulsive Peak Insertion Loss, Level-Dependent, Muffs or Plugs.
- [Products](https://viacoustics.com/our-products/)

## Products

- [IPLA Pro](https://viacoustics.com/products/ipla-pro/) - IPLA Pro is a software application that calculates Impulsive Peak Level Attenuation (IPLA) in hearing protectors in accordance with ASA/ANSI S12.24-2023. IPLA Pro works in conjunction with VIacoustics Trident (and optionally, IPLA Automator) to collect, manage and process *.wav files to determine the IPLA rating for hearing protectors. IPLA features include: File Loading and Management
- [IPLA Pro - Impulsive Peak Level Attenuation Software](https://viacoustics.com/products/ipla-pro-impulsive-peak-level-attenuation-software/) - IPLA Pro is a software application that calculates Impulsive Peak Level Attenuation (IPLA) in hearing protectors in accordance with ASA/ANSI S12.42-2023.
- [CompactDAQ](https://viacoustics.com/products/compactdaq-wireless-carriers/) - cDAQ chassis offer a wide variety of configurations and high channel count.
- [Wireless Field Noise Reduction Measurement System](https://viacoustics.com/products/wireless-field-noise-reduction/) - Wireless Field Noise Reduction Measurement System VIacoustics Wireless Field Noise Reduction System systems conducts building acoustics measurements without the need to run cables between the Source and Receive rooms. It uses NI wireless data acquisition hardware in combination with our Swept Sine Analyzer software to measure Noise Reduction, Transmission Loss, and Reverb Times. This system
- [Swept Sine Analyzer](https://viacoustics.com/products/swept-sine-analyzer/) - Application for quickly determining T60 reverb times of a room by generating a swept sine, extracting an impulse response, and analyzing the decays
- [Acculab RSS-600](https://viacoustics.com/products/acculab-rss-600/) - When calibrated, a "reference sound source" creates a known sound power. Comparison to other devices simplifies the determination of their sound power.
- [Acculab RSS-400](https://viacoustics.com/products/acculab-rss-400/) - When calibrated, a "reference sound source" creates a known sound power. Comparison to other devices simplifies the determination of their sound power.
- [Acculab RSS-700](https://viacoustics.com/products/acculab-rss-700/) - When calibrated, a "reference sound source" creates a known sound power. Comparison to other devices simplifies the determination of their sound power.
- [Acculab RSS-500](https://viacoustics.com/products/acculab-rss-500/) - When calibrated, a "reference sound source" creates a known sound power. Comparison to other devices simplifies the determination of their sound power.
- [Acculab RSS-101](https://viacoustics.com/products/acculab-rss-101/) - When calibrated, a "reference sound source" creates a known sound power. Comparison to other devices simplifies the determination of their sound power.
- [REATPro Real Ear Attenuation at Threshold Software](https://viacoustics.com/products/reatpro-real-ear-attenuation-at-threshold-software/) - REATPro conducts hearing protector attenuation measurements per ANSI S12.6, ANSI S3.19 and ISO 4869-1 standards for Noise Reduction Rating (NRR) or SNR.
- [Signal Generator Pro](https://viacoustics.com/products/signal-generator-pro/) - SigPro generates up to 8 independent noise sources or sine waves and plays WAV files at the desired sound pressure levels.
- [Audiometric Research Tool](https://viacoustics.com/products/audiometric-research-tool/) - VIacoustics Sofware Audiometric Research Tool is an extended frequency, highly configurable audiometer designed for hearing research professionals.
- [EZLD Level-Dependent Hearing Protector Test Application](https://viacoustics.com/products/ezld/) - EZLD is software for testing of Level Dependent and Active Noise hearing protection systems in accordance with standards BSI EN352, ISO 4869, and ANSI S12.42
- [REAT Plug - Boothless Real Ear Attenuation at Threshold Software for Ear Plugs](https://viacoustics.com/products/reat-plug-boothless-real-ear-attenuation-at-threshold-software/) - Real Ear Attenuation at Threshold (REAT) Boothless Testing Application for Earplugs
- [Modified Rhyme Test (MRT) Player](https://viacoustics.com/products/modified-rhyme-test-mrt-player/) - MRT Player is a tool for playing a set of phrases to a listener to select. The ANSI S3.2 Modified Rhyme Test tests communication systems speech intelligibly.
- [Waveform Analyzer](https://viacoustics.com/products/wav-file-analyzer/) - The Waveform Analyzer (WFA) is a post process analyzer for TDMS or audio WAV files that provides A-weighted and 1/3 octave band sound pressure levels over time.
- [Medical Alarm Analyzer](https://viacoustics.com/products/medical-alarm-analyzer/) - Software for testing medical device alarm sounds for compliance with IEC 60601-1-8 and IEC 60601-2-24 using audio recordings of alarm signals.
- [Impulsive Peak Insertion Loss Analyzer](https://viacoustics.com/products/impulsive-peak-insertion-loss-analyzer/) - Automated recording and file management system for testing Impulsive Peak Insertion Loss (IPIL) of a hearing protector in accordance ANSI S12.42-2010.
- [Sound Quality Analyzer](https://viacoustics.com/products/sound-quality-analyzer/) - The Sound Quality Analyzer conducts psychoacoustic sound quality analysis on standard audio WAV format recordings of product and equipment noise emission.
- [NI cDAQ-9172 Chassis](https://viacoustics.com/products/ni-cdaq-9172-chassis/) - Legacy 8-Slot, USB CompactDAQ Chassis Two general-purpose 32-bit counter/timers built into chassis Run up to 4 hardware-timed analog I/O, digital I/O, or counter/timer operations simultaneously
- [NI cDAQ-9174](https://viacoustics.com/products/ni-cdaq-9172-chassis-2/) - NI 4-Slot, USB CompactDAQ Chassis for analog input and output devices
- [Core Sound TetraMic 1st-Order Ambisonic Microphone](https://viacoustics.com/products/core-sound-tetramic-1st-order-ambisonic-microphone/) - TetraMic allows you to place a single tetrahedral microphone in a sound field, record four channels of audio, and transform them into any spatial configuration.
- [Modified Rhyme Test (MRT) Recorder](https://viacoustics.com/products/modified-rhyme-test-recorder/) - Software application for recording phrases for a Modified Rhyme Test (MRT), which is used to test speech intelligibility of a communication system.
- [EZ1050 Normal Incidence Sound Absorption](https://viacoustics.com/products/ez1050/) - EZ1050 conducts post process normal incidence acoustic impedance and sound absorption analysis from WAV filles per the ASTM E1050 standard.
- [EZ2611 Normal Incidence Sound Transmission Application](https://viacoustics.com/products/ez2611-normal-incidence-sound-transmission-application/) - EZ2611 is an automated testing application designed to efficiently perform sound transmission tests on materials in an impedance (Kundt) tube to the ASTM E2611-09 standard.
- [EZQual Software for Discrete Frequency Reverberation Chamber Qualification](https://viacoustics.com/products/ezqual-software-for-discrete-frequency-reverberation-chamber-qualification/) - EZQual is automated software for discrete frequency qualification of reverb chambers to meet industry standards ISO 3741, ANSI S12.51, AHRI 220, and AHRI 260.
- [LvT – Level vs Time – Reverberation Time Analyzer](https://viacoustics.com/products/lvt-level-vs-time-reverberation-time-analyzer/) - LvT is an optional add-on module of our Trident Multi-Channel Acoustic Analyzer. Customize and automate your reverb time testing procedure, then visualize data as it is collected and export to Excel. Read more about LvT here.
- [Trident](https://viacoustics.com/products/trident/) - Trident is a real-time multichannel, acoustic measurement application for use in product noise emission, building acoustics, or hearing sciences measurement.
- [NI PXI-8360 Remote Control Module](https://viacoustics.com/products/ni-pxi-8360-remote-control-module/) - The PXI‑8360 allows you to control PXI and CompactPCI systems from your PC using a fully transparent MXI‑Express link.
- [NI PXI-4461](https://viacoustics.com/products/ni-pxi-4461/) - A 2 input, 2 output PXI device for use in measurement applications that require both input and output, such as building acoustics measurements for sound transmission and sound absorption, or our REATPlus software application for hearing protector testing
- [Small Device Test Chambers](https://viacoustics.com/products/small-device-test-chambers/) - Basic sound level measurement, pre-compliance testing, and end of line manufacturing tests on small products and equipment.
- [G.R.A.S. 40PH](https://viacoustics.com/products/g-r-a-s-40ph/) - For low cost measurement systems for products with higher noise emissions and less critical measurement accuracy.
- [G.R.A.S. Low Noise Microphone Systems](https://viacoustics.com/products/g-r-a-s-low-noise-microphone-systems/) - State of the art transducers for laboratory measurement of products with very low noise emissions.
- [EZIL Hearing Protector Attenuation Application](https://viacoustics.com/products/ezil/) - EZIL is a data acquisition application to conduct insertion loss testing on hearing protectors in accordance with industry standards.
- [GRAS Sound Power Microphone Array Fixture](https://viacoustics.com/products/sound-power-microphone-array-fixtures/) - The Sound Power Hemisphere array fixture from GRAS Sound and Vibration provides and easy and repeatable method for positioning and holding an array of microphones. This array fixture is designed to comply with ISO 3744 table/figure B2, which is meant for broadband noise sources only. For sound power determination of all noise source types, see the VIacoustics Sound Power Array Fixture.
- [Normal Incidence Sound Absorption and Sound Transmission (Kundt) Tube](https://viacoustics.com/products/normal-incidence-sound-absorption-and-sound-transmission-kundt-tube/) - These machined aluminum Kundt tubes from SCS-Vibroacoustics in Italy are by far the highest quality tubes for measurement of acoustic impedance, normal incidence sound absorption and sound transmission that we have seen.
- [VIacoustics Sound Power Microphone Array Fixture](https://viacoustics.com/products/viacoustics-sound-power-microphone-array-fixture/) - This microphone array test fixture was designed and built by the VIacoustics team and validated in an ISO 17025 certified hemi-anechoic chamber to be fully compliant with ISO 3744 table/figure B1. Unlike the GRAS fixture this fixture is meant for all sound source types, rather than only broadband noise sources.
- [Microphone In Real Ear (MIRE) Kit](https://viacoustics.com/products/microphone-in-real-ear-mire-kit/) - MIRE kits utilize miniature microphone capsules that fits under a hearing protector or in the ear canal.
- [NI PXIe-4463](https://viacoustics.com/products/ni_pxie_4463/) - 2 analog output channels 24 bit, 204.8 kHz sampling; 118 dB dynamic range 3 analog gain settings NIST Traceable Calibration Installs in PXI expansion chassis such as PXIe-1073 or PXIe-1082 for high channel count applications National Instruments PXIe-4463
- [Shure 522 Base-Station Microphone](https://viacoustics.com/products/shure-522-base-station-microphone/) - This desktop microphone is used in the REAT system to talk to test subjects from the control room. It has a push-to-talk button, which is integrated into the system to control muting of the boundary microphone in the testing room and eliminate feedback.
- [G.R.A.S. Sound and Vibration Model 45CA Hearing Protector Test Fixture](https://viacoustics.com/products/g-r-a-s-sound-and-vibration-model-45ca-hearing-protector-test-fixture/) - The G.R.A.S. Hearing-Protector Test Fixture Type 45CA is for testing the performance of hearing-protection devices such as ear plugs and ear muffs (supra-aural as well as circumaural).
- [KEMAR Mannequin](https://viacoustics.com/products/kemar-mannequen/) - The KEMAR Mannequin from GRAS Sound and Vibration is an acoustic test fixture that provides the Head Related Transfer Function (HRTF) by simulating the physical characteristics of the human auditory system, head and torso.
- [NI PXI-1031 Chassis](https://viacoustics.com/products/ni-pxi-1031-chassis/) - Houses PXI modules and connects them with a high-performance backplane that offers timing and synchronization capabilities.
- [NI PXI-7813R FPGA card with microLEX FlexSPDIF-01 interface](https://viacoustics.com/products/ni-pxi-7813r-fpga-card-with-microlex-flexspdif-01-interface/) - A reconfigurable FPGA I/O device for onboard processing and flexible I/O operation. Comes with a microLEX FlexSPDIF-01 interface for digital audio measurement.
- [Desktop PC](https://viacoustics.com/products/desktop-pc/) - VIacoustics provides fully integrated acoustic measurement systems with a personal computer as a host, and insure compatibility with all hardware and software.
- [Anechoic Test Chambers](https://viacoustics.com/products/anechoic-test-chambers/) - Free Field Test Chamber for sound pressure level measurement, sound power level determination, acoustic research and audio measurement applications
- [Cables, Connectors and Fixturing](https://viacoustics.com/products/cables-connectors-and-fixturing/) - VIacoustics fully integrated systems include all cables, connectors and fixtures required for plug and play installation at your site. Consult your system quotation for the exact provisions that have been made for fixtures such as microphone stands or mounts, or other test fixtures required to put your system into operation quickly with all needed accessories
- [Notebook PC](https://viacoustics.com/products/notebook-pc/) - Our turnkey systems use notebook computer by Dell and Hewlett Packard to insure compatibility with all National Instruments drivers and our Trident software.
- [Microphone Accessories](https://viacoustics.com/products/microphone-accessories/) - VIacoustics turnkey measurement systems can include microphone stands, fixtures and cables needed to facilitate your acoustic measurement.
- [G.R.A.S. Microphone Calibrators](https://viacoustics.com/products/g-r-a-s-microphone-calibrators-2/) - G.R.A.S. calibrators provide a traceable daily calibration reference for your acoustic measurement system.
- [G.R.A.S. Sound Intensity Probes](https://viacoustics.com/products/g-r-a-s-sound-intensity-probes/) - G.R.A.S. sound intensity probes are compatible with our Trident software application, including support for 3D and wide band sound intensity measurement.
- [Reverberation Chambers](https://viacoustics.com/products/reverberation-chambers/) - Reverberant Test Chambers for sound power level determination and building acoustics measurements
- [G.R.A.S. 45CB Test Fixture](https://viacoustics.com/products/g-r-a-s-45cb-test-fixture/) - G.R.A.S. provides a full line of test fixtures to support acoustic measurement, recording and auditory measurement applications.
- [G.R.A.S. 43AA Ear Simulator Kits](https://viacoustics.com/products/g-r-a-s-43aa-ear-simulator-kits/) - The ear simulator is designed to resonate in the same way that the human ear does, which gives accurate results without the need for more expensive and bulky mannequins when performing audiometer calibration or production line testing of headphones or headsets.
- [G.R.A.S. 46AQ](https://viacoustics.com/products/g-r-a-s-40aq/) - 1/2" Random Incidence Microphone for use in Reverberant Test Environments
- [G.R.A.S. 146AE Ruggedized](https://viacoustics.com/products/g-r-a-s-146ae-1-2-ccp-free-field-rugged-microphone/) - Like the 46AE, but built to withstand extreme conditions.
- [G.R.A.S. 46AE Standard](https://viacoustics.com/products/g-r-a-s-46ae/) - Used in laboratory acoustic measurements and for measuring quiet products (less than 30 dBA).
- [NI USB-9234](https://viacoustics.com/products/ni-usb-9234/) - A low-cost, four-channel data acquisition module that can be mounted in a CompactDAQ chassis.
- [NI 9260](https://viacoustics.com/products/ni-9260/) - 51.2 kS/s/ch Simultaneous, 3 Vrms, 2-Channel C Series Voltage Output Module—The NI‑9260 is an instrument-grade dynamic signal generator for testing the audio components and capabilities of consumer electronic devices and providing excitation in structural test applications. Unlike sound card-based solutions, the NI‑9260 can be deployed quickly and recalibrated to guarantee long-term measurement repeatability and decreased
- [NI 9250](https://viacoustics.com/products/ni-9250/) - 2-Channel, 102.4 kS/s/ch Simultaneous, ±5 V, C Series Sound and Vibration Input Module This 2 channel device for USB interface using either the cDAQ 9171 single slot carrier for a low cost 2 channel digital signal analyzer or the multi-slot cDAQ 9174 for a multi-channel data acquisition system for sound and vibration measurement. The NI
- [NI PXIe-4464](https://viacoustics.com/products/pxie-4464/) - The National Instruments PXIe-4464 is our standard data acquisition card for laboratory sound pressure level measurement and sound power level determination of low noise products. It is also used for high speed time waveform recording for our impulsive measurement applications.
- [NI PXI Chassis](https://viacoustics.com/products/ni-pxi-chassis/) - Our preferred form factor for laboratory measurement systems and high channel count systems.
- [NI PXI-6220](https://viacoustics.com/products/ni-pxi-6220/) - A low cost solution for digital I/O and reading analog sensors.
- [NI PXIe-4499](https://viacoustics.com/products/ni-pxie-4499/) - The best selection for very high channel count systems that require analog gain to accomodate low voltage transducers.
- [VIacoustics High-Power Attenuator (L-pad)](https://viacoustics.com/products/viacoustics-high-power-attenuator-l-pad/) - Our custom High-Power Attenuators provide 30dB of attenuation. Combined with a high power amplifier, we reduce the noise floor below the threshold of hearing.
- [VIacoustics Response Switch and Attenuator Control Unit](https://viacoustics.com/products/viacoustics-response-switch-and-attenuator-control-unit/) - Interfaces with optical and mechanical switches, controls L-pad via software, and controls muting of intercom in REAT systems.
- [Bryston 6BSST² Three-Channel Amplifier](https://viacoustics.com/products/bryston-6bsst²-three-channel-amplifier/) - Paired with our custom high-power attenuator this amplifier supplies the power to generate a sound field with a noise floor below the threshold of human hearing
- [Crown 135MA Three Input, 35 Watt Mixer-Amplifier](https://viacoustics.com/products/crown-135ma-three-input-35-watt-mixer-amplifier/) - These amplifiers are used in our REAT systems for talk-back and talk-forward microphones, and support muting via external switch.
- [Furman Elite-15 PFI](https://viacoustics.com/products/furman-elite-15-pfi/) - The Furman Elite Power Conditioner is used in REAT systems to ensure stable power and reduce electrical noise to all components of the system.

## Systems

- [Wireless Field Noise Reduction System](https://viacoustics.com/systems/wireless-field-noise-reduction-system/) - Wireless Field Noise Reduction Measurement System VIacoustics Wireless Field Noise Reduction System systems conducts building acoustics measurements without the need to run cables between the Source and Receive rooms. It uses NI wireless data acquisition hardware in combination with our Swept Sine Analyzer software to measure Noise Reduction, Transmission Loss, and Reverb Times. This system
- [Medical Alarm Analyzer System](https://viacoustics.com/systems/medical-alarm-analyzer-system/) - Analysis of medical equipment alarm signals for compliance with IEC 60601-1-8 requirements.
- [Real Ear Attenuation at Threshold (REAT) Systems for Hearing Protector Testing](https://viacoustics.com/systems/real-ear-attenuation-at-threshold-reat-systems-for-hearing-protector-testing/) - Contact us about building a Real Ear Attenuation at Threshold system, featuring custom hardware and our REATPro software, for your audiometric testing lab.
- [Sound Power Level Estimation System](https://viacoustics.com/systems/sound-power-level-estimation-system/) - Sound Power Level Estimation system is a low cost system for conducting SPL measurements on equipment for product development and pre-compliance testing.
- [End of Line Noise Test System](https://viacoustics.com/systems/end-of-line-noise-test-system/) - End of Line Noise Test Systems from VIacoustics are designed to support end of line product noise testing on factory floors and quality assurance environments.
- [Basic Sound Level Measurement System](https://viacoustics.com/systems/basic-sound-level-measurement-system/) - An economical and easy to learn system for measurement of A-weighted and proportional octave band sound pressure levels.
- [Small Device Noise Emission Test System](https://viacoustics.com/systems/small-device-noise-emission-test-system/) - Small Device Noise Emission Test Systems for noise measurement of small devices in computers, consumer electronics, appliances, and automobiles.
- [Modified Rhyme Test (MRT) System](https://viacoustics.com/systems/modified-rhyme-test-mrt-system/) - The VIacoustics MRT system is a platform for performing repeatable, level-calibrated ANSI_ASA S3.2 Modified Rhyme Tests in the presence of noise.
- [Sound Power Level Determination System](https://viacoustics.com/systems/sound-power-level-determination-system/) - Our Sound Power Level Measurement System is fully compliant with industry standards such as ISO 3744, ISO 3745, ANSI S12.54 and ANSI S12.55.
- [Building Acoustics Measurement System](https://viacoustics.com/systems/building-acoustics-measurement-system/) - Automate acoustical testing of your building materials with our customizable software and systems. Each component of every system we create is tested and configured before shipment, and we provide onsite installation and training to get you up and running and taking measurements right away. We also offer online and telephone support. If you want software

## Product Features

- [IPLA Pro-File Loading and Management](https://viacoustics.com/features/file-loading-and-management/) - This is a test
- [EZ1050 - Export](https://viacoustics.com/features/ez1050-export/)
- [EZ1050 - Specific Admittance](https://viacoustics.com/features/ez1050-specific-admittance/)
- [EZ1050 - Specific Impedance](https://viacoustics.com/features/ez1050-specific-impedance/)
- [EZ1050 - Absorption Coefficient](https://viacoustics.com/features/ez1050-absorption-coefficient/)
- [EZ1050 - Reflection Coefficient](https://viacoustics.com/features/ez1050-reflection-coefficient/)
- [EZ1050 - Specimen TF](https://viacoustics.com/features/ez1050-specimen-tf/)
- [EZ1050 - Specimen SPL](https://viacoustics.com/features/ez1050-specimen-spl/)
- [EZ1050 - Setup](https://viacoustics.com/features/ez1050-setup/)
- [EZ1050 - Parameter Outputs](https://viacoustics.com/features/ez1050-parameter-outputs/)
- [EZ1050 - Calibration](https://viacoustics.com/features/ez1050-calibration/)
- [All Acculab RSS Specs](https://viacoustics.com/features/acculab-rss-specs/) - Follow this link to see specifications of individual Acculab reference sound sources. 2021 RSS Manual all models
- [SQA - Tonality](https://viacoustics.com/features/sqa-tonality/) - Sound Quality Analyzer conducts Tonality Analysis on audio WAV files Tonality is the ratio of correlated energy to uncorrelated energy in a signal.
- [SQA - Modulation](https://viacoustics.com/features/sqa-modulation/) - Sound Quality Analyzer conducts Modulation Analysis on audio WAV files Modulation (%) – The degree of modulation is determined in each of 47 overlapping critical bands. Apparent modulations due to broadband noise are identified by their band-to-band correlation and suppressed. An overall modulation value is obtained by weighting the band results according to empirically determined
- [SQA - Prominent Tone Analysis](https://viacoustics.com/features/sqa-prominent-tone-analysis/) - Sound Quality Analyzer conducts prominent tone anlysis per the Promince Ratio method as defined in industry standards such as ISO 7779 and ANSI S1.13.
- [SQA - ISO 532B Loudness (Sones)](https://viacoustics.com/features/iso-532b-loudness-sones-2/) - Sound Quality Analyzer conducts psychoacoustic loudness analysis of audio WAV files. Loudness (sones) – A measure of the perceived sensation of the volume of a sound. The loudness of the sound considers not only the level of the sound but the frequency composition of the sound. Broadband sounds will have a lower loudness than narrowband
- [SQA - Sharpness](https://viacoustics.com/features/sqa-sharpness/) - Sound Quality Analyzer conducts Sharpness analysis on audio WAV files.
- [SQA - Roughness](https://viacoustics.com/features/sqa-roughness/) - Sound Quality Analyzer conducts Roughness analysis on audio WAV files.
- [SQA - Fluctuation Strength](https://viacoustics.com/features/sqa-fluctuation-strength/) - Sound Quality Analyzer conducts Fluctuation Strength Analysis on audio WAV files.
- [RSS-101U Calibration](https://viacoustics.com/features/rss-101u-calibration/)
- [WFA - Waveform Analyzer - Calibration](https://viacoustics.com/features/wave-file-analyzer-calibration/) - Waveform Analyzer provides several methods for achieving proper level calibration of WAV and TDMS files, which is an inherently uncalibrated file format, but a convenient file format because there are so many ways to record and listen to WAV and TDMS format files.
- [WFA - Level vs Time Analysis](https://viacoustics.com/features/wfa-level-vs-time-analysis/) - The Waveform Analyzer software provides sound pressure level vs time analysis over the user specified frequency range and time intervals. 
- [WFA - Waveform Analysis Configuration](https://viacoustics.com/features/wav-file-analysis-configuration/) - WAV File Analyzer allows you to set your analysis parameter for sound level versus time analysis of audio WAV Files.
- [Trident - Time Waveform Recording](https://viacoustics.com/features/time-waveform-recording/) - Trident's calibrated time waveform recorder creates multi-channel calibrated audio WAV file recordings in parallel with the measurement functions of Trident.
- [EZ2611 - Coherence](https://viacoustics.com/features/ez2611-coherence/) - Data collected at each microphone position is compared to microphone one and coherence is displayed here. These plots can be viewed on at a time or all at once.
- [Trident - Sound Intensity](https://viacoustics.com/features/sound-intensity/) - Trident's sound intensity module operates in parallel with the sound level measurement features of Trident, allowing you to acquire both sound pressure levels and sound intensity levels simultaneously.
- [Trident - Reverberation Time Analyzer](https://viacoustics.com/features/reverberation-time-analyzer/) - Trident's Level versus Time module conducts reverberation time analysis for building acoustics applications.
- [Trident - Reference Spectrum Display](https://viacoustics.com/features/reference-spectrum-display/) - Trident's Reference Spectrum Feature is a powerful display tool that allows comparison of the current sound pressure levels to stored spectra.
- [Trident - Limit Analyzer](https://viacoustics.com/features/limit-analyzer/) - The Trident Limit Analyzer feature is designed to support end of line product test and other Pass/Fail type measurement applications.
- [Trident - ISO 532B Loudness (Sones)](https://viacoustics.com/features/iso-532b-loudness-sones/) - Trident's ISO 532B Loudness Analyzer conducts loudness analysis in parallel with the sound level meter and FFT analysis.
- [Trident - FFT Analysis](https://viacoustics.com/features/fft-analysis/) - Trident's FFT analyzer provides users with a high resolution, multi-channel FFT analyzer with graphical zoom and cursoring options.
- [Sound Isolation](https://viacoustics.com/features/sound-isolation/) - Small Device Test Systems use Small Device Test Chambers to provide sound isolation of exterior sounds from the measurement of sound emissions of your device.
- [Trident - MS Excel Export](https://viacoustics.com/features/ms-excel-export/) - Quick and easy export allows users to export their data into MSExcel spreadsheets or text files.
- [Trident - Sound Level Analysis](https://viacoustics.com/features/sound-level-analysis/) - Trident's basic operational mode is the sound level meter mode.
- [Standard Sizes and Models](https://viacoustics.com/features/standard-sizes-and-models/) - VIacoustics supplies Small Device Test Chambers from ETS-Lindgren as part of its standard and custom test systems for product noise emission measurement.
- [NI PXI-446x IEPE Signal Conditioning](https://viacoustics.com/features/ni-pxi-446x-iepe-signal-conditioning/)
- [NI PXI-4461 Analog Outputs](https://viacoustics.com/features/ni-pxi-4461-analog-outputs/)
- [NI PXI-446x - Analog Inputs](https://viacoustics.com/features/pxi-446x-analog-inputs/)
- [Medical Alarm Analyzer - Melodic Sequence Analysis](https://viacoustics.com/features/medical-alarm-analyzer-melodic-sequence-analysis/) - For melodic alarms, the MAA software determines the frequency information of each note and compares it to a specific alarm melody dictated by IEC 60601-1-8.
- [Medical Alarm Analyzer - Frequency Analysis](https://viacoustics.com/features/medical-alarm-analyzer-frequency-analysis/) - MAA conducts frequency analysis on alarm signals to insure the spectral content meets IEC 60601-1-8 standard for required harmonics in the signal.
- [Medical Alarm Analyzer - Time Waveform Analysis](https://viacoustics.com/features/medical-alarm-analyzer-time-waveform-analysis/) - Medical Alarm Analyzer conducts time waveform analysis on medical alarm signals for compliance with the requirements of IEC 60601-1-8
- [Medical Alarm Analyzer - File Import and Settings](https://viacoustics.com/features/medical-alarm-analyzer-file-import-and-settings/) - The medical alarm analyzer is designed to analyze WAV file recordings of medical alarm signals in accordance with the requirements of IEC 60610-1-8. 
- [WFA - Excel Export](https://viacoustics.com/features/wfa-excel-export/) - Back to Play Back and Listen Forward to Calibration
- [WFA - Play Back and Listen](https://viacoustics.com/features/wfa-play-back-and-listen/) - Back to Level vs. Time Analysis Forward to Excel Export
- [SQA - FFT  and STFT Analysis](https://viacoustics.com/features/sqa-fft-and-stft-analysis/) - Sound Quality Analyzer conducts FFT (Fast Fourier Transform) and STFT (Short Time Fourier Transform) analysis on audio WAV format files.
- [SQA - Filtering and Listening Tools](https://viacoustics.com/features/sqa-filtering-and-listening-tools/) - Sound Quality Analyzer provides tools for listening to your audio WAV files while you view the analysis.
- [SQA - Sound Level Analysis](https://viacoustics.com/features/sound-level-analysis-2/) - Sound Quality Analyzer conducts several sound level analysis functions on audio WAV format files.
- [SQA - Level Calibration](https://viacoustics.com/features/sqa-level-calibration/) - Sound Quality Analyzer provides several methods for achieving proper level calibration of WAV files, which is an inherently uncalibrated file format, but a convienient file format because there are so many ways to record and listen to WAV format files.
- [Microphones - IEPE Powered Transducer](https://viacoustics.com/features/iepe-powered-transducer/) - Powered by NI Devices and Uses Common BNC Cables
- [Microphones - Preamplifier Gain](https://viacoustics.com/features/microphones-preamplifier-gain/) - 20 dB Gain on microphone preamplifier for use with high voltage input data acquistion devices
- [Microphones - Preamplifier High Pass and A-weighted Filtering](https://viacoustics.com/features/microphones-preamplifier-high-pass-and-a-weighted-filtering/) - The GRAS Sound and Vibration Model 26 CF preamplifier provides switchable high pass and A-weighted filtering. The integrated 20 Hz high pass filter helps eliminate inaudible low frequency signals from entering the data acquisition system and using up headroom. An integrated A-weighted filter removes energy as defined in by the A-weighting curve, allowing you to make A-weighted
- [Microphones - Sub Threshold of Hearing Measurements](https://viacoustics.com/features/microphones-sub-threshold-of-hearing-measurements/) - Make measurements below threshold of hearing with these GRAS Low Noise Microphone Systems
- [EZQual Excel Export](https://viacoustics.com/features/ezqual-excel-export/) - EZQual is designed to make it easy to export your test results into pre-configured Excel analysis templates that conduct the standard deviation and criteria comparison analysis.
- [EZQual Automated Test Execution Mode](https://viacoustics.com/features/ezqual-automated-test-execution-mode/) - EZQual Automated Test Execution mode is designed to allow you to Start It, Walk Away and come back to get your data.
- [EZQual Manual Execution/Calibration Mode](https://viacoustics.com/features/ezqual-manual-executioncalibration-mode/) - EZQual provides a manual operation mode that can be used to both calibrate your system and test signal levels prior to an automatic execution.
- [EZQual Setup](https://viacoustics.com/features/ezqual-feature-setup/) - EZQual setup allows you to configure the qualification measurement to meet the needs of your reverberation chamber and instrumentation system.
- [EZDamp Excel Export](https://viacoustics.com/features/ezdamp-excel-export/) - EZDamp provides an export routine that makes it easy to transfer the test results into pre-configured MSExcel template workbooks that provide additional data analysis after the test is complete. EZDamp is provided with several MSExcel analysis templates for post process of the EZDamp data. Templates for determinng the loss factor and Youngs modulus from the
- [EZDamp Automated Execution Mode](https://viacoustics.com/features/ezdamp-automated-execution-mode/) - EZDamp provides both single test point manual mode operation and multiple test point automated execution modes. The automated mode provides instructions to the temperature chamber controller to go to the desired temperature, while monitoring a thermocouple to determine if the bar has reached temperature. Once the bar has reached the required temperature, within the configured
- [EZDamp Test Setup](https://viacoustics.com/features/ezdamp-test-setup/) - EZDamp provides test setup controls that allow you to configure the software to meet your specific testing needs, allowing it to work with the thermodynamic properties of your test setup and your National Instruments hardware. Configure Input and Output Hardware Settings Configure input transducer sensitivity Configure sampling settings Configure thermocouple settings EZDamp Test Setup allows
- [EZLD - Export](https://viacoustics.com/features/ezld-export/) - Export data to Excel.
- [EZLD - Results](https://viacoustics.com/features/ezld-results/) - See data plotted as transfer functions relative to criteria level.
- [EZLD - Auto Occluded](https://viacoustics.com/features/ezld-auto-occluded/) - Perform test with a single click of a button!
- [EZLD - Set Levels](https://viacoustics.com/features/ezld-set-levels/) - Check parameters given DFE correction, and rewrite them if necessary.
- [EZLD - DFE Level Calibration](https://viacoustics.com/features/ezld-diffuse-field-equivalent-level-calibration/) - Calculate the transfer function for the test subject's ear relative to a reference microphone.
- [EZLD - Test Settings](https://viacoustics.com/features/ezld-test-settings/) - Set the parameters of how the test is performed based on the type of hearing protector. Configure criteria level, desired overshoot, timing and range of levels. Select directory and default files for exporting data.
- [EZLD - Sound Field Calibration](https://viacoustics.com/features/ezld-sound-field-calibration/) - Calibrate the level of each noise source in the sound field at the reference position.
- [EZLD - Configuration](https://viacoustics.com/features/ezld-configuration/) - Select audio hardware devices and settings. Set global maximum values for peak voltage and SPL. Browse files and select WAV files to provide the desired test signals.
- [EZIL - Export](https://viacoustics.com/features/ezil-export/) - EZIL will generate a neatly organized Microsoft Excel file into which your data is exported. The user may also use their own Excel template.
- [EZIL - HP Attenuation](https://viacoustics.com/features/ezil-hp-attenuation/) - See a plot of left and right ear attenuation calculated in real-time based on unoccluded levels and background noise previously measured. Reference attenuation levels from previous tests and maximum possible attenuation can also be plotted here.
- [EZIL - Background Noise SPL](https://viacoustics.com/features/ezil-background-noise-spl/) - Account for any additional noise that may otherwise skew results, acoustical and/or electrical. Trident acquires this baseline data and EZIL compensates for it when calculating final hearing protector attenuation data.
- [EZIL - Unoccluded SPL](https://viacoustics.com/features/ezil-unoccluded-spl/) - Acquire and plot frequency dependent SPL data for the unoccluded ear via the Trident API with the click of a button.
- [EZIL - Configuration](https://viacoustics.com/features/ezil-configuration/) - To configure the EZIL software for testing, simply choose the microphone input channels you wish to use to acquire data and the frequency range to be analyzed. An optional input channel for a reference microphone can also be selected, and reference attenuation levels can be entered manually or pasted from Excel.
- [REATPro - Comparison](https://viacoustics.com/features/reatpro-comparison/) - Allows comparison of subject threshold to qualifying average. Comparison of unoccluded thresholds within a session. Indicates compliance with ANSI S12.6 requirements.
- [REATPro - Excel Export](https://viacoustics.com/features/reatplus-excel-export/) - Export to MSExcel based template files that users can customize to meet their own needs. Both Unoccluded and Occluded thresholds, as well as the sound pressure level vs time trace history to MSExcel for detailed analysis of threshold determination time and reversal history. A file header section provides documentation on all test setup parameters.
- [REATPro - Test Execution](https://viacoustics.com/features/reatpro-test-execution/) - Runs in automated manor from first to last frequency. Runs both unoccluded and occluded modes. Unoccluded mode has max level protections to ensure subject safety. Provides level tracking and current threshold info with comparison to prior threshold.
- [REATPro - Documentation](https://viacoustics.com/features/reatpro-documentation/) - Retrieve prior thresholds from subject for comparison with current thresholds as required by ANSI S12.6. Define test type: qualifying subject, training as subject, conducting protector test. Subjects are tracked by subject ID for HIPA compliance. Document what protector is being tested. Load expected attenuation to speed up occluded threshold seeking.
- [REATPro - Manual / Calibration](https://viacoustics.com/features/reatpro-manual-calibration/) - The Manual / Calibration tab can be used to present and calibrate any stimulus at any level to any or all outputs, continuously or pulsed. This can be useful for subject training, checking that the sound system is functioning and troubleshooting problems.
- [REATPro - Setup](https://viacoustics.com/features/reatplus-configuration/) - REATPro provides flexible configuration options to support a variety of data acquisition systems and audiometric testing protocols.
- [EZ2611 - Setup](https://viacoustics.com/features/ez2611-setup/) - A standard test setup is displayed, conditions and parameters can be entered on this tab. Based on the general information entered here, and the files loaded on the WAV Files tab, all results are calculated for you.
- [EZ2611 - WAV Files](https://viacoustics.com/features/ez2611-wav-files/) - Load data collected (WAV files) and click "Calculate". Analysis will be loaded the next tabs based on what is entered here and on the Setup tab.
- [EZ2611 - Calibration](https://viacoustics.com/features/ez2611-calibration/) - Use this tab to verify that all microphones are calibrated to each other in magnitude and phase.
- [EZ2611 - Specimen SPL](https://viacoustics.com/features/ez2611-specimen-spl/) - Back to the Calibration tab Here the sound pressure level (SPL) is shown in the frequency domain for each microphone. When using the two-load method, data from each load is shown together. The frequency range displayed is variable, and can show FFT, 1/3 octave band, or 1 octave band levels. Forward to the Coherence tab
- [EZ2611 - Specimen TF](https://viacoustics.com/features/ez2611-specimen-tf/) - This tab displays the transfer functions relating all other microphones to the first. One plot shows the magnitude relation and the other shows phase relation.
- [EZ2611 - Results](https://viacoustics.com/features/ez2611-results/) - Plots: Absorption Coefficient, Transmission Loss, Reflection Coefficient, Transmission Coefficient, Characteristic Impedance, Specific Impedance, Wave Number
- [EZ2611 - Export](https://viacoustics.com/features/ez2611-export/) - All data collected and generated by EZ2611 can be exported to Excel. Excel workbooks are automatically configured, labelled, and populated.
- [PCI-4472 Specifications](https://viacoustics.com/features/pci-4472-specifications/) - 8 analog input channels 24 bit, 102.4 kHz sampling; 110 dB dynamic range 6 +/- 10 volt input range Software selectable IEPE signal conditioning (4mA) NIST Traceable Calibration Installs in standard PCI slot of desktop PC or workstation
- [REATPlus - Fitting Noise and Fixture Testing Noise Source](https://viacoustics.com/features/reatplus-fitting-noise-and-fixture-stimulus/) - Fitting Noise and Noise Source for Fixture Based Testing REATPlus provides pink, white and red noise signals for use as fitting noise for subjects, or as a noise source for fixture based testing according to ANSI S12.42. Noise can be presented at a variety of levels to meet the current test needs.
- [REATPro - Automated Threshold Detection (deprecated)](https://viacoustics.com/features/reatplus-threshold-detection/) - REATPro uses the threshold detection settings from the configuration file to automatically determine hearing thresholds in both the Unoccluded and Occluded subject modes. The stimulus is automatically presented as configured in the stimulus settings and the subject response state determines rather the next stimulus level increases, or decreases, for determination of hearing thresholds using the modified Bekesey audiometric method.
- [REATPro - Stimulus Generation (deprecated)](https://viacoustics.com/features/reatplus-stimulus-generation/) - REATPro provides complete user control over Stimulus Setup parameters and complete user control over Threshold Detection parameters.

## Services

- [Consulting Services](https://viacoustics.com/services/consulting-services/) - We offer a wide variety of acoustic and quality system consulting services from basic sound level measurement to a fully accredited test laboratory.
- [System Support Services](https://viacoustics.com/services/system-support-services/) - VIacoustics turnkey measurement systems include post installation support via telephone, e-mail and/or online support sessions.
- [System Integration](https://viacoustics.com/services/system-integration/) - VIacoustics turnkey measurement systems are built in a working acoustics laboratory and are fully assembled, calibrated and tested for plug and play operation when the arrive at your site.
- [Onsite Installation and Training](https://viacoustics.com/services/onsite-installation-and-training/) - VIacoustics turnkey measurement systems are shipped to your site ready for final installation and plug-and-play operation.

## Galleries

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## Categories

- [News and Updates](https://viacoustics.com/category/news-and-updates/)

## Product Categories

- [Acoustic Test Chambers](https://viacoustics.com/product-category/acoustic-test-chambers/)
- [Data Acquisition](https://viacoustics.com/product-category/data-acquisition/)
- [cDAQ](https://viacoustics.com/product-category/data-acquisition/cdaq/)
- [PXI](https://viacoustics.com/product-category/data-acquisition/pxi/)
- [Microphones](https://viacoustics.com/product-category/microphones/)
- [GRAS Sound and Vibration](https://viacoustics.com/product-category/microphones/gras-sound-and-vibration/)
- [Other Microphones](https://viacoustics.com/product-category/microphones/other-microphones/)
- [Other Products](https://viacoustics.com/product-category/other-products/)
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- [Acoustic Measurement](https://viacoustics.com/product-category/software/acoustic-measurement/)
- [Analysis](https://viacoustics.com/product-category/software/analysis/)
- [Building Acoustics](https://viacoustics.com/product-category/software/building-acoustics/)
- [Hearing Sciences Research](https://viacoustics.com/product-category/software/hearing-sciences-research/)
- [Impedance Tube Tests](https://viacoustics.com/product-category/software/impedance-tube-tests/)
- [Signal Generation](https://viacoustics.com/product-category/software/signal-generation/)
- [Test Methods](https://viacoustics.com/product-category/software/test-methods/)
- [Tools](https://viacoustics.com/product-category/software/tools/)
- [Test Fixtures](https://viacoustics.com/product-category/test-fixtures/)
- [Reference Sound Sources](https://viacoustics.com/product-category/reference-sound-sources/) - The Acculab RSS, originally developed by Angelo Campanella in 1982, now available from VIacoustics. Multiple models available starting at $2,750.
- [Medical Devices](https://viacoustics.com/product-category/software/medical-devices/) - Software for medical alarm compliance testing