| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB/T 4854.1-1999 | English | 439 |
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Days<=4
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Acoustics--Reference zero for the calibration of audiometric equipment--Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones
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GB/T 4854.1-1999
| Obsolete |
GB/T 4854.1-1999
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