Artificial Measuring Equipment
Hearing Protection
The GRAS 45CA Hearing Protector Test Rig.
• WS1P or WS2P microphones respectively 1-inch or ½-inch (with adapter, e.g.
RA0017).
• IEC 60318 Ear Simulators (RA0039)
• IEC 60318 Ear Simulators (RA0039)
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
circum-aural). It conforms with ISO 4869-3 and can be used with one1 or two 2:
It can also be fitted with IEC 60711 Ear Simulators (RA0045) and a range of moulded-rubber Ears for testing ear plugs. The Test Fixture is mounted on a resilient base which reduces the noise floor to a minimum in a typical test situation.
It can also be fitted with IEC 60711 Ear Simulators (RA0045) and a range of moulded-rubber Ears for testing ear plugs. The Test Fixture is mounted on a resilient base which reduces the noise floor to a minimum in a typical test situation.
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