ISO 532:1975 Preview
Acoustics -- Method for calculating loudness level
This standard has been revised by ISO 532-1:2017.
This standard was last reviewed and confirmed in 2012. Therefore this version remains current.
Specifies two methods for determining a single numerical value of a given sound, the first method is based on physical measurements, such as spectrum analyses in octave bands, the second method is based on spektrum analyses in one-third octave bands.