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GB/T 4854.4-1999 Active
GB/T 4854.4-1999 Acoustics—Reference zero for the calibration of audiometric equipment—Part 4:Reference levels for narrow-band masking noise
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 4854.4-1999 |
| CCS | Physics and mechanics |
| ICS | Integrated acoustic measurement and noise suppression |
| Implement Date | 1999-09-01 |
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