BS 2497-7:1988被替代
Standard reference zero for the calibration of pure tone air conduction audiometers. Specification for a standard reference zero at frequencies intermediate between those given in Parts 5 and 6 of BS 2497
出版：British Standards Institution
專家解讀視頻
基本信息
標準編號： BS 2497-7:1988
發(fā)布時間：1988/2/29 0:00:00
標準類別：Standard
出版單位：British Standards Institution
標準頁數(shù)：0
標準簡介
Reference equivalent threshold sound pressure levels supplementary to those specified for earphones and couplers in Part 5 and for earphones and artificial ears in Part 6.
標準備注
? British Standards Institution 2013
替代本標準的新標準
