Hearing-protector Test Fixture Type 45CA

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:

• WS1P or WS2P microphones
  respectively 1-inch or ½-inch (with adapter, e.g. RA0017)
• IEC 60318 Ear Simulators (RA0039)

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.

Download PDF Data Sheet: pd_45CA_ver_26_June_09.PDF

¹ For monaural measurements

² For binaural measurements

³ minimum required as in Figure 1 of ISO/DIS 4869-3

Related Products:

Type 40EN³
Type 26AC³
Type 12AD
RA0017
RA0039
RA0045

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ISO 4869-3
(can also be used with two microphones for binaural testing)

Acoustic cup GR0974
Acoustic plug GR1069

See data sheet

total height: 374 mm
width: 145 mm
base diameter: 215 mm

11.6 kg