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IEC 60118-1:1975 ed1.0

Заменен
Method of measurement of characteristics of hearing aids with induction pick-up coil input — 9 стр.
Describes a method of determining the physical performance of hearing aids using an induction pick-up coil within an audio-frequency magnetic field.
ICS
17.140.50 Electroacoustics. Including sound level meters / Электроакустика. Включая слуховые аппараты и шумомеры