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Re: Partial loudness - if the background is a complex signal


I have not received many responses to the question below, but some replies off-list, showing a great interest in this question.
Although it is not much, let me just sum up the pointers to the literature I have received.
- Glasberg, B.R., and Moore, B.C.J. 2005. Development and evaluation of a model for predicting the audibility of time-varying sounds in the presence of background sounds. Journal of the Audio Engineering Society 53: 906-918.
- Bradter and Hobohm, Loudness calculation for individual acoustical objects within complex temporally variable sounds, AES 124th Conv., 2008.
- Verhey and Heise, Einfluss der Zeitstruktur des Hintergrundes auf die Tonhaltigkeit und Lautheit des tonalen Vordergrundes (in German), DAGA, 2010.

I think it is a very interesting topic, with many potential applications.

All the best,


Am 01.02.2011 12:34, schrieb Christian Uhle:
Dear readers,

this is my first post here: Hello everyone.
The question which puzzles me for quite some time is related to partial loudness.
The loudness of a sound is reduced if it is presented in noise.
Models exist which are capable of predicting the partial loudness, e.g. [1].

My understanding is that in [1] the interferer (the masker, or background) is stationary noise.
Are there also models for partial loudness if the interferer is a complex signal, e.g. music or speech?

I assume that such a model needs to determine a timbral similarity between the target and the interferer.
(For example: In an extreme case where both signals sound (are) the same, the interferer would not reduce but increase the loudness of the signal.
If we start to modulate the frequency of one of the signals slightly, this will affect the partial loudness, but how (quantitatively)?)
The similarity of both signals depends on comodulation of sub-band amplitude envelopes of signal and interferer, and on other cues as well, as in stream segregation mechanisms.

Pointers to related work and papers as well as your thougths about this are highly appreciated.
Another question would be if experimental data about partial loudness in complex signals exist, and where to find them.

All the best,


[1] Moore, Glasberg, Baer, "A Model for the Prediction of Thresholds, Loudness, and Partial Loudness", JAES, 1997.

Dr.-Ing. Christian Uhle
IIS Labs
Dept. Audio
Fraunhofer Institute for Integrated Circuits IIS
Am Wolfsmantel 33
91058 Erlangen
E-mail: christian.uhle@xxxxxxxxxxxxxxxxx
Phone:  +49(0) 9131 / 776 - 6230
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