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dc.contributor.authorMoir, TJ
dc.contributor.authorQi, T
dc.date.accessioned2011-06-09T02:33:52Z
dc.date.available2011-06-09T02:33:52Z
dc.date.copyright2007
dc.date.issued2011-06-09
dc.identifier.citationInternational Journal of Information and Communication Engineering, vol.3(4), pp.298 - 304
dc.identifier.issn2010-4049 (print) 2010-4057 (online)
dc.identifier.urihttp://hdl.handle.net/10292/1262
dc.description.abstractA combined three-microphone voice activity detector (VAD) and noise-canceling system is studied to enhance speech recognition in an automobile environment. A previous experiment clearly shows the ability of the composite system to cancel a single noise source outside of a defined zone. This paper investigates the performance of the composite system when there are frequently moving noise sources (noise sources are coming from different locations but are not always presented at the same time) e.g. there is other passenger speech or speech from a radio when a desired speech is presented. To work in a frequently moving noise sources environment, whilst a three-microphone voice activity detector (VAD) detects voice from a “VAD valid zone”, the 3-microphone noise canceller uses a “noise canceller valid zone” defined in freespace around the users head. Therefore, a desired voice should be in the intersection of the noise canceller valid zone and VAD valid zone. Thus all noise is suppressed outside this intersection of area. Experiments are shown for a real environment e.g. all results were recorded in a car by omni-directional electret condenser microphones.
dc.publisherWorld Academy of Science, Engineering and Technology (WASET)
dc.relation.urihttp://www.waset.org/journals/ijice/v3/v3-4-40.pdf
dc.rightsThe open access research journals aim to maintain a rapid editorial procedure and a rigorous peer-review system. The submitted original articles are reviewed within approximately three months of submission and the accepted articles are published on the internet immediately upon receiving the final versions. All accepted articles are published free of charge.
dc.titleAutomotive 3-microphone noise canceller in a frequently moving noise source environment
dc.typeJournal Article
dc.rights.accessrightsOpenAccess


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