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IEC 60942:1997 ed2.0

Заменен
Electroacoustics - Sound calibrators — 57 стр.
Specifies the performance requirements for three classes of sound calibrator. Sound calibrators are designed to produce a known effective sound pressure level or levels at a specified frequency or frequencies when coupled to specified models of microphone or specified configurations, for example, with or without protective grid.
ICS
33.100.20 Immunity / Защищенность
17.140.50 Electroacoustics. Including sound level meters / Электроакустика. Включая слуховые аппараты и шумомеры