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About This Item


Full Description

Specifies two methods for calculating the loudness level of a complex sound in terms of a single number calculated from a spectrum analysis. Method A utilizes physical measurements obtained from spectrum analysis in terms of octave bands. Method B utilizes spectrum analysis in terms of one-third octave bands. This Standard is identical with and has been reproduced from ISO 532:1975.

Document History

  1. AS ISO 532.1:2019

    Acoustics - Methods for calculating loudness, Part 1: Zwicker Method

    • Most Recent
  2. AS 3657.2-1996


    Acoustics - Expression of the subjective magnitude of sound or noise, Part 2: Method for calculating loudness level

    • Historical Version