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Sound in air

Working group 1.61

Test / Calibration of ear simulators, acoustic and mechanical couplers

I. Acoustic characteristics of ear simulators according to IEC 60318-1 and acoustic couplers according to IEC 60318-3
Coupler types
e.g.
Uncertainty
(1000 Hz)
Procedure Typical duration Frequency range
in Hz
B&K 4152     
GRAS RA0075
0,2 dB Comparison with reference coupler 5 days 125 - 8000
B&K  4153      GRAS RA0039 0,2 dB Comparison with reference ear simulator 5 days 125 - 8000
B&K 4157       GRAS RA0045 0,2 dB Measurement of transfer impedance 5 days 125 - 10000

Calibration of the microphones used with the couplers.

II. Mechanical impedance and force sensitivity level of mechanical couplers according to IEC 60318-6
Coupler types
e.g.
Uncertainty
(1000 Hz)
Measurement Typical duration Frequency range
in Hz
B&K 4930 0,4 dB  Mechanical impedance and force sensitivity level 5 days 125 - 8000
 

 

 

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