Historical
ANSI S3.4-1980 (R2003)
Procedure for the Computation of Loudness of Noise
Specifies a procedure for calculating the loudness of certain classes of noise. In applications of the procedure, it is assumed that the spectrum of the sound has been measured in terms of sound pressure levels in 1/3-octave or 1/1-octave bands in either a diffuse of free field. Loudness as herein computed depends upon the acoustic properties of a sound that impinges upon a normal-hearing listener. Loudness is also a prime determinant of a person's affective response to sound. The affective response may be expressed in terms such as noisiness, annoyance, and unacceptability.
Content Provider
Acoustical Society of America [asa]
