Code of China Chinese Classification Professional Classification ICS Classification Latest Value-added Services

Title Standard No. Implemented On
Hearing aid equipment not entirely worn on the listenerGB 11455-19891990-4-1
Methods of measurement of performance characteristics of hearing aids under simulated in situ working conditionsGB 11453-19891990-4-1
Guide to hearing aid standardsGB/T 11452-19891990-4-1
Specifications for the editing and production of prog-ramme source for subjective assessment of sound quali-ty of electro-acoustic productsGB/T 10240-19881989-7-1
Methods of measurement on headphonesGB 6832-19861987-10-1
Technical specification of measurement condenser microphonesGB 3661-19831984-3-1
Methods for determining electroacoustic characteristics of measurement condenser microphonesGB 3662-19831984-3-1
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