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| Chinese National Standard Category: Physics and Mechanics |
| English Title: | Normal equal-loudness contours for pure tones under free field listening conditions |
| Chinese Title: | 自由场纯音标准等响线 |
| Standard No.: | GB 4963-1985 |
| Category No.: | A42 |
| Issued by: | China State Bureau of Standards |
| Issued on: | 1985-02-28 |
| Implemented on: | 1985-10-1 |
| Status: | superseded |
| Superseded by: | GB/T 4963-2007 Acoustics—Normal equal-loudness-level contours |
| Superseded on: | 2008-5-1 |
| Abolished on: | 2008-05-01 |
| Superseding: | |
| Word Count: | 3000 words |
| Similar Standards: | GB/T 25898-2010 GB/T 11670-1989 QJ A 1293-1998 GB/T 30544.12-2023 GB/T 42106-2022 GA/T 1727-2020 GB/T 30113.1-2013 GB/T 17754-2012 GB/T 22458-2008 GB/T 18022-2000 GB/T 4854.7-1999 GB/T 4854.4-1999 GB/T 17696-1999 GB/T 4854.1-1999 GB/T 17754-1999 QJ 1293A-1998 GB/T 3947-1996 JB/T 7705-1995 GB/T 3223-1994 GB/T 13823.7-1994 |
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