Test Fixtures

Impedance Tubes

Normal Incidence Sound Absorption and Sound Transmission (Kundt) Tube

Kundt Tube for Measurement of Normal Incidence Sound Absorption and Sound Transmission Acoustic Impendence 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.  The modular section design allows it to be […]

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Kemar

KEMAR Mannequen

The KEMAR Mannequen 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. The KEMAR Mannequen is used to auditory research application and binaural recording/sound quality applications. When fitted with IEC 711 couplers, the […]

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45CB with Hearing Protector

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.

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GRAS 45ca hearing protector fixture

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). It conforms with ISO 4869-3 and can be used with one1 or two2: WS1P or WS2P microphones respectively 1-inch or ½-inch (with adapter, e.g. RA0017) IEC 60318 Ear […]

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GRAS Sound Power Fixture

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 for sound power level determination. GRAS Hemisphere Brochure_21-1

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Impedance Tubes

Acoustic Impedance and Sound Transmission Tubes

Machined aluminum tubes with mounting ports for microphones. Available in three diameters (28mm, 45mm and 100 mm) and configurable for either normal incidence sound absorption or sound transmission measurements. Machined aluminum construction reduces influence of background noise and tube wall absorption. Use with our Trident data acquisition software and EZ1050 or EZ-NITL applications for post […]

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