In-Ear Microphone Hybrid Speech Enhancement

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Nils Westerlund, Mattias Dahl, Ingvar Claesson
Title: In-Ear Microphone Hybrid Speech Enhancement
Conference name: the Fourth IASTED International Conference Signal and Image Processing (IASTED2002)
Year: 2002
Pagination: 142-5
ISBN: 0-88986-340-7
Publisher: ACTA Press
City: Kaua'i, HI, USA
Organization: Blekinge Institute of Technology
Department: Department of Telecommunications and Signal Processing (Institutionen för telekommunikation och signalbehandling)
Department of Telecommunications and Signal Processing S-372 25 Ronneby
+46 455 38 50 00
Authors e-mail: nwe@bth.se, mdh@bth.se, icl@bth.se
Language: English
Abstract: This paper presents a novel speech enhancement approach for performing noise reduction in severely disturbed environments. A small microphone for
communication purposes is placed inside the external auditory canal to pick up the speech signal originating from the speech production organ. The speech enhancement is achieved by using three different noise reduction methods: High frequencies are attenuated by passive absorbers, low frequency components are attenuated by employing active noise control and finally a broadband noise reduction is achieved by using spectral subtraction.
Summary in Swedish: En mikrfon för kommunikationsändamål placeras i hörselgången på en användare som sedan utrustas med ett par aktiva hörselkåpor. Signalen från mikrofonen behandlas sedan med så kallad "spektral subtraktion" för att ytterligare dämpa eventuellt bakgrundsbuller. Resultatet blir en signal med reducerad buller tack vare att passiv och aktiv bullerdämpning samt spektral subtraktion.
Subject: Signal Processing\Speech Enhancement
Keywords: Ear-mic, speech enhancement, spectral subtraction, active noise control
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