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Localization Uncertainty in Time-Amplitude Stereophonic Reproduction

Research output: Contribution to journalArticle

Enzo De Sena, Zoran Cvetkovic, Huseyin Hacihabiboglu, Marc Moonen, Toon van Waterschoot

Original languageEnglish
Number of pages16
JournalIeee Transactions On Audio Speech And Language Processing
Early online date20 Feb 2020
DOIs
Publication statusE-pub ahead of print - 20 Feb 2020

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  • Localization Uncertainty in Time_DE SENA_Epub20Feb2020_GREEN AAM

    Localization_Uncertainty_in_Time_DE_SENA_Epub20Feb2020_GREEN_AAM.pdf, 1.55 MB, application/pdf

    28/02/2020

    Accepted author manuscript

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King's Authors

Abstract

This paper studies the effects of inter-channel time and level differences in stereophonic reproduction on perceived localization uncertainty, which is defined as how difficult it is for a listener to tell where a sound source is located. Towards this end, a computational model of localization uncertainty is proposed first. The model calculates inter-aural time and level difference cues, and compares them to those associated to free- field point-like sources. The comparison is carried out using a particular distance functional that replicates the increased uncertainty observed experimentally with inconsistent inter-aural time and level difference cues. The model is validated by formal listening tests, achieving a Pearson correlation of 0.99. The model is then used to predict localization uncertainty for stereophonic setups and a listener in central and off-central positions. Results show that amplitude methods achieve a slightly lower localization uncertainty for a listener positioned exactly in the center of the sweet spot. As soon as the listener moves away from that position, the situation reverses, with time-amplitude methods achieving a lower localization uncertainty.

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