Standards for calculating loudness of stationary or time-varying sounds

Hugo Fastl, Florian Völk, Martin Straubinger

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

21 Scopus citations

Abstract

For pure tones at 1 kHz with different levels loudness values from ANSI S3.4-2007 or DIN 45631 (1991) are essentially the same. Deviations of calculated values from loudness values expected on the basis of subjective evaluations amount to a maximum of 5 % in line with the accuracy possible in loudness experiments. However, for pink noise of different levels, ANSI S3.4-2007 gives systematically higher loudness values than DIN 45631 (1991). The magnitude of the relative differences depends on level and reaches factors between 1.27 and 2.31 for the levels considered. Interestingly, when shifting the curve obtained for pink noise from ANSI S3.4-2007 by 5 dB towards higher levels, it almost coincides with the curve obtained from DIN 45631 (1991). Technical sounds usually produce time-varying loudness functions which can be assessed using DIN 45631/A1 (2008). More or less extreme examples are given for a planing machine and a jackhammer.

Original languageEnglish
Title of host publication38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009
Pages1508-1513
Number of pages6
StatePublished - 2009
Event38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009 - Ottawa, ON, Canada
Duration: 23 Aug 200926 Aug 2009

Publication series

Name38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009
Volume3

Conference

Conference38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009
Country/TerritoryCanada
CityOttawa, ON
Period23/08/0926/08/09

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