BS ISO 389-4:1994被替代
Acoustics - Reference Zero For The Calibration Of Audiometric Equipment - Reference Levels For Narrowband Masking Noise
出版：British Standards Institution
專家解讀視頻
基本信息
標準編號： BS ISO 389-4:1994
發布時間：1995/3/15 0:00:00
標準類別：Standard
出版單位：British Standards Institution
標準頁數：12
標準簡介
Specifies four reference levels for narrow band masking noise presented by air construction from an earphone in pure tone audiometry. Also gives detailed definitions and annexes.BS AMD 10484 RENUMBERS STD
標準備注
? British Standards Institution 2013
Renumbered and superseded by BS EN ISO 389-4.
Supersedes BS 7113(1989) and 86/53942 DC.
(10/2005)
等同采用的國際標準
ISO 389-4:1994 - Identical
