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| Chinese National Standard Category: Physics and Mechanics |
| English Title: | Acoustics--Reference zero for the calibration of audiometric equipment--Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones |
| Chinese Title: | 声学 校准测听设备的基准零级 第1部分:压耳式耳机纯音基准等效阈声压级 |
| Standard No.: | GB/T 4854.1-1999 |
| Category No.: | A42 |
| Issued by: | |
| Issued on: | 1999-03-08 |
| Implemented on: | 1999-9-1 |
| Status: | abolished |
| Superseded by: | GB/T 4854.1-2004 Acoustics?Reference zero for the calibration of audiometric equipment?Part 1:Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones |
| Superseded on: | 2004-12-1 |
| Abolished on: | 2004-12-01 |
| Superseding: | GB/T 4854-1984 |
| Word Count: | 5000 words |
| Similar Standards: |
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