GB/T 4854.7-1999

Abolished

Acoustics--Reference zero for the calibration of audiometric equipment--Part 7:Reference threshold of hearing under free-field and diffuse-field listening conditions

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

Standard Type

GBT

ICS

13.140

CCS

A42

Status

废止

Issue Date

1999-03-08

Implementation

1999-09-01

Responsible Dept

中国科学院

Drafting Unit

中国科学院