Test Fixtures

KEMAR Mannequin

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.

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

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. 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).

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.

GRAS Sound Power Microphone Array Fixture

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

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.