Acoustics--Reference zero for the calibration of audiometric equipment--Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones GB/T 4854.1-1999 - Chinese Category:GB/T 4854.1-1999

English Title:	Acoustics--Reference zero for the calibration of audiometric equipment--Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones
Chinese Title:	声学校准测听设备的基准零级第1部分:压耳式耳机纯音基准等效阈声压级
Standard No.:	GB/T 4854.1-1999
Category No.:	A42
Issued by:
Issued on:	1999-03-08
Implemented on:	1999-9-1
Status:	superseded
Superseded by:	GB/T 4854.1-2004 Acoustics?Reference zero for the calibration of audiometric equipment?Part 1:Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones
Superseded on:	2004-12-1
Abolished on:	2004-12-01
Superseding:	GB/T 4854-1984 Standard reference zero for the calibration of pure-tone audiometer
Word Count:	5000 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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