ANSI/ASA S3.1-1999 听力测定实验室的最大可允许环境噪声等级

标准号：ANSI/ASA S3.1-1999
中文标准名称：听力测定实验室的*大可允许环境噪声等级
英文标准名称：Maximum Permissible Ambient Noise Levels for Audiometric Test Rooms
标准类型：A59;Z32
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：A59;Z32
国际标准分类号：17.140.01
适用范围：Specifies maximum permissible ambient noise levels (MPANLs) allowed in an audiometric test room that produce negligible masking (<2 dB) of test signals presented at reference equivalent threshold levels specified in ANSI S3.6-1996. The MPANLs are specified from 125 to 8000 Hz in octave and one-third octave band intervals for two audiometric testing conditions (ears covered and ears not covered) and for three test frequency ranges (125 to 8000 Hz, 250 to 8000 Hz, and 500 to 8000 Hz).