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Standards Development
This part of IEC 61094 specifies the geometrical configuration and essential electroacoustic characteristics for condenser microphones used as transfer standards for the dissemination of the unit of sound pressure and for sound pressure measurements of high accuracy.
The specifications are intended to optimise reproducibility in pressure sensitivity calibration by comparison in couplers and when coupled to a given sound calibrator, in the frequency range from 10 Hz to 1 260 Hz, when using the transfer standard microphone as a reference device.
The specifications do not ensure that a transfer standard microphone can be used at frequencies above 1 260 Hz. An LS2P reference microphone is needed at frequencies above 1 260 Hz. Specifications for transfer standard microphones at higher frequencies are included because they are necessary for the intended use.
This part of IEC 61094 also supplements the mnemonic system established in IEC 61094-1 for classifying measurement microphones, to include transfer standard microphones.
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