A Time-Frequency Auditory Model Using Wavelet Packets

Finn Agerkvist

A Time-Frequency Auditory Model Using Wavelet Packets

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Abstract

A time-frequency auditory model is presented. The model uses the wavelet packet analysis as the preprocessor. The auditory filters are modelled by the rounded exponential filters, and the excitation is smoothed by a window function. By comparing time-frequency excitation patterns it is shown that the change in the time-frequency excitation pattern introduced when a test tone at masked threshold is added to the masker is approximately equal to 7 dB for all types of maskers. The classic detection ratio therefore overrates the detection efficiency of the auditory system.

Original language	English
Journal	Journal of the Audio Engineering Society
Volume	44
Issue number	1/2
Pages (from-to)	37-50
ISSN	1549-4950
Publication status	Published - 1996
Event	97th Audio Engineering Society Convention - San Francisco, United States Duration: 10 Nov 1994 → 13 Nov 1994 Conference number: 97

Conference

Conference	97th Audio Engineering Society Convention
Number	97
Country/Territory	United States
City	San Francisco
Period	10/11/1994 → 13/11/1994

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Cite this

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AB - A time-frequency auditory model is presented. The model uses the wavelet packet analysis as the preprocessor. The auditory filters are modelled by the rounded exponential filters, and the excitation is smoothed by a window function. By comparing time-frequency excitation patterns it is shown that the change in the time-frequency excitation pattern introduced when a test tone at masked threshold is added to the masker is approximately equal to 7 dB for all types of maskers. The classic detection ratio therefore overrates the detection efficiency of the auditory system.

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