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Chinese National Standard Category: Acoustic Measurement

English Title: Verification Regulation of Aural Impedance Audiometers
Chinese Title: 阻抗听力计检定规程
Standard No.: JJG 991-2004
Category No.: A59
Issued by: AQSIQ
Issued on: 2004-9-21
Implemented on: 2004-12-21
Status: superseded
Superseded by:JJG 991-2017 Audiometric Equipment—Instruments for the Measurement of Aural Acoustic Impedance/Admittance
Superseded on:2018-5-20
Abolished on:
Superseding:
Word Count:10000 words
Similar Standards: GB/T 19889.10-2006   GB/T 19889.1-2005   GB/T 19889.7-2005   GB/T 19889.6-2005   GB/T 6881-2023   GB/T 3785.2-2023   GB/T 42559-2023   GB/T 42553-2023   GB/T 3785.1-2023   GB/T 42473-2023   GB/T 19889.7-2022   GB/T 3222.1-2022   GB/T 41283.1-2022   GB/T 19889.2-2022   GB/T 17248.1-2022   GB/Z 38251-2019   GB/T 20441.2-2018   GB/T 3785.3-2018   GB/T 7341.5-2018   GB/T 17248.5-2018  
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