PSD estimation of multiple sound sources in a reverberant room using a spherical microphone array

Abdullah Fahim, Prasanga N. Samarasinghe, Thushara D. Abhayapala

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    7 Citations (Scopus)

    Abstract

    We propose an efficient method to estimate source power spectral densities (PSDs) in a multi-source reverberant environment using a spherical microphone array. The proposed method utilizes the spatial correlation between the spherical harmonics (SH) coefficients of a sound field to estimate source PSDs. The use of the spatial cross-correlation of the SH coefficients allows us to employ the method in an environment with a higher number of sources compared to conventional methods. Furthermore, the orthogonality property of the SH basis functions saves the effort of designing specific beam patterns of a conventional beamformer-based method. We evaluate the performance of the algorithm with different number of sources in practical reverberant and non-reverberant rooms. We also demonstrate an application of the method by separating source signals using a conventional beamformer and a Wiener post-filter designed from the estimated PSDs.

    Original languageEnglish
    Title of host publication2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages76-80
    Number of pages5
    ISBN (Electronic)9781538616321
    DOIs
    Publication statusPublished - 7 Dec 2017
    Event2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017 - New Paltz, United States
    Duration: 15 Oct 201718 Oct 2017

    Publication series

    NameIEEE Workshop on Applications of Signal Processing to Audio and Acoustics
    Volume2017-October

    Conference

    Conference2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017
    Country/TerritoryUnited States
    CityNew Paltz
    Period15/10/1718/10/17

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