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GB/T 4854.7-1999
GB/T 4854.7-1999 Acoustics—Reference zero for the calibration of audiometric equipment—Part 7:Reference threshold of hearing under free-field and diffuse-field listening conditions
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Replaced |
| Standard Code | GB/T 4854.7-1999 |
| CCS | Physics and mechanics |
| ICS | Integrated acoustic measurement and noise suppression |
| Implement Date | 1999-09-01 |
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