標準號：ANSI/ASA S12.68-2007
中文標準名稱：聽力保護器損壞時A加權聲壓級有效性的評估方法
英文標準名稱：Methods of Estimating Effective A-Weighted Sound Pressure Levels when Hearing Protectors Are Worn
標準類型：C73
發布日期：2007/8/20 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：C73
國際標準分類號：17.140.01
適用范圍：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.