ASA S12.71-2018

Performance Criteria for Systems that Estimate the Attenuation of Passive Hearing Protectors for Individual Users
standard by American National Standards of the Acoustical Society of America, 06/06/2017

ASA S3.41-2015 (R2020)

American National Standard for Audible Emergency Evacuation Signal (E2) and Evacuation Signals with Relocation Instructions (ESRI)
standard by American National Standards of the Acoustical Society of America, 07/14/2015