ASA

American National Standard Methods for Measurement of Specification of Performance Measurement of Hearing Assistance Devices/Systems
standard by American National Standards of the Acoustical Society of America, 01/24/2014

American National Standard Electroacoustics - Simulators of Human Head and Ear - Part 5: 2 cm*2 Coupler for the Measurement of Hearing Aids and Earphones Coupled to the Ear by Means of Ear Inserts (a modified nationally adopted international standard)
standard by American National Standards of the Acoustical Society of America, 07/21/2014

American National Standard Methods for Measuring the Effect of Head-worn Devices on Directional Sound Localization in the Horizontal Plane
standard by American National Standards of the Acoustical Society of America, 2019