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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Status: | superseded |
Superseded by: | JJG 991-2017 Audiometric Equipment—Instruments for the Measurement of Aural Acoustic Impedance/Admittance |
Superseded on: | 2018-5-20 |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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