Catalog

RA0020-A is a nosecone for 1/2" microphones. It is similar to RA0020 but made of aluminium for lightness...

The RA0022 is specially designed and optimized for use with 1/4" microphones for sound pressure measurements, when high speed wind comes from one known direction e.g. in a wind tunnel...

Coupler for 1” microphones. For use with GRAS pistonphones...

Two-port coupler for 1/2” microphones. Used in comparison calibrations between two 1/2” microphones; one of which is a reference microphone. It can also be used in measuring the P-I (Pressure-Intensity) Index of intensity probes at 250 Hz. For use with GRAS 42AA & 42AP Pistonpho..

The GRAS RA0038 Coupler is a standard 2 cm³ Coupler according to IEC 126 and ANSI S3.7-1973. It uses a ½" microphone (preferably the GRAS 40AG) with a suitable preamplifier (e.g. GRAS 26AC which is a ¼" preamplifier but is supplied with an adapter for ½" microphones)...

The GRAS IEC 318 RA0039 Ear Simulator is an ear simulator with an input impedance closely resembling that of an average human ear. When the RA0039 is coupled to a sound source, the impedance will load the sound source similar to the loading caused by the human ear. The RA0039 meets the requirements ..

The RA0041 is an adapter for calibrating the GRAS 41CN Outdoor Microphone System . It fits over the rain protection cap of the 41CN and permits in-situ calibration using a Pistonphone such as the 42AA or a Calibrator such as the 42AB...

Two-port high-pressure coupler for 1/2” microphones. Used in comparison calibrations between two 1/2” microphones; one of which is a reference microphone. It can also be used in measuring the P-I (Pressure-Intensity) Index of intensity probes at 250 Hz. For use with GRAS 42AC Pistonphone...

The GRAS RA0045 is an ear simulator with an acoustic input impedance closely resembling that of an average human ear. It includes a 40AG pressure microphone and is individually calibrated with this specific microphone...

GRAS RA0045-S1 is an ear simulator with an acoustic input impedance closely resembling that of an average human ear. The RA0045 includes a 40AO 1/2" prepolarized pressure microphon and each RA0045 is individually calibrated with this specific microphone...

The GRAS RA0045-S4 Ear Simulator is an ear simulator with an acoustic input impedance closely resembling that of an average human ear. The RA0045-S4 includes a 40AP pressure microphone and each RA0045-S4 is individually calibrated with this specific microphone...

The GRAS RA0045-S5 Ear Simulator is an ear simulator with an acoustic input impedance closely resembling that of an average human ear. The RA0045 includes a 40BP pressure microphone and each RA0045-S5 is individually calibrated with this specific microphone...