ASA S12.9-1992/Part 2 (R2018)

American National Standard Quantities and Procedures for Description and Measurement of Outdoor Environmental Sound – Part 2: Measurement of Long-Term, Wide-Area Sound
standard by American National Standards of the Acoustical Society of America, 01/01/1992

ASA S12.15-1992 (R2020)

American National Standard For Acoustics-Portable Electric Power Tools, Stationary and Fixed Electric Power Tools, and Gardening Appliances-Measurement of Sound Emitted
standard by American National Standards of the Acoustical Society of America, 12/07/1992