ASA

American National Standard for Measurement Microphones, Part 8: Methods for determining the free-field sensitivity of working standard microphones by comparison
standard by American National Standards of the Acoustical Society of America, 06/28/2021

American National Standard for Procedures for Calibration of Underwater Electroacoustic Transducers.
standard by American National Standards of the Acoustical Society of America, 02/17/2012

American National Standard for Electroacoustics - Sound Level Meters - Part 1: Specifications (a nationally adopted international standard). (Revision of ANSI S1.4-1983 (R2006), ANSI S1.4a-1985 (R2006) and ANSI S1.43-1997 (R2007))
standard by American National Standards of the Acoustical Society of America, 07/21/2014

American National Standard for Design Response of Weighting Networks for Acoustical Measurements.
standard by American National Standards of the Acoustical Society of America, 2020