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IEC 61094-4:1995 ed1.0

Действует
Measurement microphones - Part 4: Specifications for working standard microphones — 23 стр.
Applies to working standard microphones. Specifies mechanical dimensions and certain electroacoustical characteristics for working standard microphones used in measuring systems for the determination of sound pressure to enable these microphones to be used as transfer standards in the calibration of acoustic measurement instruments.
ICS
33.160.50 Auxiliaries. Including headphones, loudspeakers, microphones, etc. / Вспомогательные устройства. Включая наушники, громкоговорители, микрофоны и т.д.
17.140.50 Electroacoustics. Including sound level meters / Электроакустика. Включая слуховые аппараты и шумомеры