GB/T 4854.7-1999Acoustics--Reference zero for the calibration of audiometric equipment--Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions (English PDF)
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
GB/T 4854.7 | Evolution and historical versions
| Std ID | Title | Status |
|---|---|---|
| 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 | Valid |
| 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 | Obsolete |
GB/T 4854.7-1999 is obsolete. It has been replaced by GB/T 4854.7-2008. This page sells the obsolete edition, for projects and contracts that still cite it.
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Issued by
State Bureau of Quality and Technical Supervision
Level / Type
National · Recommended
Issue date
March 8, 1999
Implementation date
September 1, 1999
Scope
GB/T 4854.7-1999 is the English-translated version of 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.
GB/T 4854.7-1999 is the Chinese national standard "Acoustics--Reference zero for the calibration of audiometric equipment--Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions".
It was issued on March 8, 1999 by the State Bureau of Quality and Technical Supervision, and took effect on September 1, 1999. It is obsolete: it has been replaced by GB/T 4854.7-2008.
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Document preview — GB/T 4854.7-1999
National Standard of the People's Republic of China
Issued by: State Bureau of Quality and Technical Supervision
Contents
- Document data
1 Document data
Sector: National standard (Recommended).
Issuing body: State Bureau of Quality and Technical Supervision.
Date of issue: 1999-03-08.
Date of implementation: 1999-09-01.
Status: obsolete, replaced by GB/T 4854.7-2008.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.
Referenced standards
Cited by
- GB/T 44804-2024Acoustics - Satistical distribution of hearing thresholds of otologically normal persons in the age range from 18 years to 25 years under free-field listening conditions
- GB/T 7341.1-2010Electroacoustics -- Audiological equipment -- Part 1: Pure-tone audiometers
- GB/T 7341-1987Electroacoustics -- Audiological equipment -- Part 1: Pure-tone audiometers
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Related Standards
GB/T 4854.8-2007 — Acoustics -- Reference zero for the calibration of audiometric equipment -- Part 8: Reference equivalent threshold sound pressure levels for pure tone and circumaural earphones
GB/T 4854.6-2014 — Acoustics -- Reference zero for the calibration of audiometric equipment -- Part 6: Reference hearing threshold levels for test signals of short duration
GB/T 4854.9-2016 — Acoustics -- Reference zero for the calibration of audiometric equipment -- Part 9: Preferred test conditions for the determination of reference hearing threshold levels
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GB/T 4854.7-1999
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