ANSI/ASA S12.68-2007 听力保护器损坏时A加权声压级有效性的评估方法

标准号：ANSI/ASA S12.68-2007
中文标准名称：听力保护器损坏时A加权声压级有效性的评估方法
英文标准名称：Methods of Estimating Effective A-Weighted Sound Pressure Levels when Hearing Protectors Are Worn
标准类型：C73
发布日期：2007/8/20 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：C73
国际标准分类号：17.140.01
适用范围：Specifies 3 methods, in ascending order of complexity of use and potential accuracy, for estimation of sound pressure levels that are effective when a hearing protector is worn: 1) Noise Level Reduction Statistic for use with A-weighting (NRSA), 2) Noise level Reduction Statistic, Graphical (NRSG), and 3) the octave-band method. Also specifies, in the case of NRSA and NRSG, that values will be presented for both 80th and 20th percentiles to reflect the range of attenuation that can be anticipated.