ANSI/ASA S1.13:2005 (R2010)

Specifies requirements and describes procedures for the measurement of sound pressure levels in air at a single point in space. These apply primarily to measurements performed indoors but may be utilized in outdoor measurements under specified conditions. This is a fundamental standard applicable to a wide range of measurements and to sounds that may differ widely in temporal and spectral characteristics; more specific ANS complement its requirements. A classification is given of the types of sound generally encountered, and the preferred descriptor for each type is identified.