calculated loudness level

11.06  calculated loudness level. Loudness level calculated by a specified procedure. Unit, phon.

Annotation              Such procedures are given in ANSI/ASA S3.4, American National Standard Procedure for the Computation of Loudness of Steady Sounds, and in ISO 532, Acoustics – Method for Calculating Loudness Level. The procedures given in these standards are not compatible and will yield differing results.