ASA S3.2-2020

Method for Measuring the Intelligibility of Speech over Communication Systems
standard by American National Standards of the Acoustical Society of America, 12/09/2020

ASA S1.4-2014/Part 1 / IEC 61672-1:2013 (R2019)

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

ASA S12.9-2013 / Part 3 (R2018)

American National Standard Quantities and Procedures for Description and Measurement of Environmental Sound – Part 3: Short-term Measurements with an Observer Present
standard by American National Standards of the Acoustical Society of America, 01/15/2013