Background noise reproduction using spherical microphone array measurements

Wookeun Song, Sylvain Favrot, Jorg Buchholz

    Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

    Abstract

    Background noise reproduction for the evaluation of telecommunication devices, such as a mobile phone, was investigated using the measurement of spherical microphone arrays. Two techniques, i.e. binaural synthesis using headphones and higher-order Ambisonics, were evaluated for the study. Binaural synthesis was made by performing spherical beamforming, and subsequently taking head-related transfer functions (HRTFs) into account. Higher-order Ambisonics was achieved by decomposing the measured/simulated sound fields into a series of spherical harmonic functions (encoding) and deriving loudspeaker signals based on the geometry of a loudspeaker setup (decoding). Both techniques require the same type of recordings using a spherical microphone array. They were compared with existing techniques, such as the four-loudspeaker playback in ETSI EG 202 396-1. The investigation provides practical examples for objective and subjective assessment of background noise, and reveals the advantages of the techniques for the evaluation of devices under test in the presence of background noise.
    Original languageEnglish
    Title of host publicationInternational Symposium on Electroacoustic Technologies 2011
    Place of PublicationChina
    PublisherNanjing University
    Publication statusPublished - 2011
    EventInternational Symposium on Electroacoustic Technologies - Shenzhen, China
    Duration: 12 Nov 201113 Nov 2011

    Conference

    ConferenceInternational Symposium on Electroacoustic Technologies
    CityShenzhen, China
    Period12/11/1113/11/11

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