Standard No.:	GB/T 34828-2017
English Name:	Acoustics-Test methods for the qualification of free-field environments
Chinese Name:	声学 自由场环境评定测试方法
Chinese Classification:	A59    Acoustic Measurement
Professional Classification:	GB    National Standard
ICS Classification:	17.140.01 17.140.01    Acoustic measurements and noise abatement in general 17.140.01
Issued by:	AQSIQ; SAC
Issued on:	2017-11-01
Implemented on:	2018-5-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	10500 words
Price(USD):	315.00
Delivery:	via email in 1~5 business day

本标准规定的方法适用于评定消声室和半消声室等声学空间是否满足自由声场条件。
本标准规定了用于评定消声空间和半消声空间性能的离散频率法和宽带法，规定了采用无指向性声源进行自由声场评定的流程，详细阐述了得到测试结果的过程，并给出了测量不确定度的评定方法。