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| Chinese National Standard Category: Physics and Mechanics |
| English Title: | Acoustics-Reference zero for the calibration of audiometric equipment-Part 7：Reference threshold of hearing under free-field and diffuse-field listening conditions |
| Chinese Title: | 声学 校准测听设备的基准零级 第7部分：自由场与扩散场测听的基准听阈 |
| Standard No.: | GB/T 4854.7-1999 |
| Category No.: | A42 |
| Issued by: | CSBTS |
| Issued on: | 1999-03-08 |
| Implemented on: | 1999-9-1 |
| Status: | superseded |
| Superseded by: | GB/T 4854.7-2008 Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions |
| Superseded on: | 2009-2-1 |
| Abolished on: | |
| Superseding: | |
| Word Count: | 6500 words |
| Similar Standards: | GB/T 44454-2024 GB/T 44234-2024 GB/T 43845-2024 GB/T 44075-2024 GB/T 44076-2024 GB 6075-1985 GB/T 43682-2024 GB/T 30544.12-2023 GB/T 42106-2022 GA/T 1727-2020 GB 3241-1982 GB/T 13592-1992 GB/T 14573.4-1993 GB/T 5265-1985 GB/T 14465-1993 GB/T 15508-1995 GB 3239-1982 GB 4129-1984 QJ 2632-1994 QJ A 1293-1998 |
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