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Original Article

An improved model for loudness coding during auditory adaptation

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Pages 499-506 | Published online: 07 Jul 2009
 

Abstract

A comparison of loudness adaptation measured at four baseline intensities and at test values 10 and 20 dB above the baseline intensities revealed an orderly decline. The magnitude of the decline in loudness adaptation with the increasing difference between the test values and the baseline was shown to agree with earlier theories. A method for closely estimating the change in loudness adaptation is presented in convenient graphic form and in algebraic equations.

Résumé

Nous avons, pour quatre intensités de base, comparé les valeurs d'adaptation de la sonie pour des intensités de test: 1) égales à l'intensité de base; 2) supérieures de 10 dB à l'intensité de base et 3) supérieures de 20 dB à l'intensité de base. Nous avons observé une diminution régulière de la valeur de l'adaptation avec l'augmentation de l'écart entre les intensités de test et les intensités de base, en accord avec les théories émises par Hood [1950], Small [1963] et Stevens [1956]. Nous présentons une méthode sous forme graphique et algébrique qui permet d'estimer les valeurs d'adaptation de la sonie.

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