ISO/DIS 532-1:2016 en

Akoetsiek - Methoden voor berekening van luidheid - Deel 1: Zwicker methode

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Status Ontwerp
Aantal pagina's 62
Commissie Akoestiek
Gepubliceerd op 01-05-2016
Taal Engels
This part of ISO 532 specifies two methods for estimating the loudness and loudness level of sounds as perceived by otologically normal listeners under specific listening conditions: the first method is intended for stationary and the second method for arbitrary non-stationary (time varying) sounds including stationary sounds as a special case. The method can be applied to any sound recorded as single channel measurements using a microphone, or as multi-channel measurements, e.g. by means of a head and torso simulator (see Annex D). Considering the fact that most of the important technical sounds are time varying, a model of time varying loudness is preferable. At the moment, this part of ISO 532 is the sole internationally standardized method for calculating loudness of time varying sounds. The methods are based on the Zwicker algorithm [12]. The method for stationary sounds is provided for reasons of continuity and offers also the use of measured one-third-octave-band levels as input. The more general method for arbitrary sounds calculates the specific loudness pattern based on measured time signals by applying a signal processing model which is directly related to physiological and psychological characteristics of the human hearing system. Loudness is calculated from the specific loudness pattern. It has been shown that this method provides a good match to the results of many loudness experiments using synthetic and technical sounds. No pre-knowledge about the properties of the sound (e.g. broadband or narrowband noise, tonal content) and no user interactions are required for the fully automated application of the method. The evaluation of the harmful effect of sound events is outside the scope of this International Standard.


ICS-code 17.140.01
Nederlandse titel Akoetsiek - Methoden voor berekening van luidheid - Deel 1: Zwicker methode
Engelse titel Acoustics - Methods for calculating loudness - Part 1: Zwicker method



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