Standard No.:	GB/T 4854.1-2004
English Name:	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 Name:	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
Chinese Classification:	A59    Acoustic Measurement
Professional Classification:	GB    National Standard
Source Content Issued by:	AQSIQ; SAC
Issued on:	2004-05-13
Implemented on:	2004-12-1
Status:	valid
Superseding:	GB/T 4854.1-1999 Acoustics--Reference zero for the calibration of audiometric equipment--Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones
Target Language:	English
File Format:	PDF
Word Count:	4000 words
Translation Price(USD):	120.0
Delivery:	via email in 1~3 business day

GB/T 4854的本部分规定了纯音气导听力计听阀级分度的基准零级。本部分阐述的资料，即在符合GB/T 7342规定的耦合腔中测量的两种不同型号标准耳机的响应，以及在符合GB/T 7614规定的仿真耳上测量的(4.3中规定的)其他型号压耳式耳机的响应，可直接用于听力计样准。本标准是以来自多个负责测听标准化的实验室和科学出版物的资料作出的估算为基础的。本部分所推荐的基准级的导出和应用，见附录A。