American National Standard Electroacoustics - Simulators of Human Head and Ear - Part 3: Acoustic Coupler for the Calibration of Supra-aural Earphones Used in Audiometry (a nationally adopted international standard)
standard by American National Standards of the Acoustical Society of America, 05/15/2015

American National Standard Methods for Calculation of the Speech Intelligibility Index
standard by American National Standards of the Acoustical Society of America, 06/02/1997

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