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Unvoiced Speech Recognition Using Tissue-conductive Acoustic Sensor

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dc.contributor.author Panikos Heracleous en
dc.contributor.author Tomomi Kaino en
dc.contributor.author Hiroshi Saruwatari en
dc.contributor.author Kiyohiro Shikano en
dc.date.accessioned 2012-07-05T07:00:47Z en
dc.date.available 2012-07-05T07:00:47Z en
dc.date.issued 2007-01 en
dc.identifier.issn 1687-6172 en
dc.identifier.uri http://hdl.handle.net/10061/7821 en
dc.description.abstract We present the use of stethoscope and silicon NAM (nonaudible murmur) microphones in automatic speech recognition. NAM microphones are special acoustic sensors, which are attached behind the talker's ear and can capture not only normal (audible) speech, but also very quietly uttered speech (nonaudible murmur). As a result, NAM microphones can be applied in automatic speech recognition systems when privacy is desired in human-machine communication. Moreover, NAM microphones show robustness against noise and they might be used in special systems (speech recognition, speech transform, etc.) for sound-impaired people. Using adaptation techniques and a small amount of training data, we achieved for a 20 k dictation task a 93.9% word accuracy for nonaudible murmur recognition in a clean environment. In this paper, we also investigate nonaudible murmur recognition in noisy environments and the effect of the Lombard reflex on nonaudible murmur recognition. We also propose three methods to integrate audible speech and nonaudible murmur recognition using a stethoscope NAM microphone with very promising results. en
dc.language.iso en en
dc.publisher Hindawi Publishing Corporation/Springer en
dc.rights Copyright (C) 2007 Hindawi Publishing Corporation/Springer. en
dc.title Unvoiced Speech Recognition Using Tissue-conductive Acoustic Sensor en
dc.type.nii Journal Article en
dc.textversion publisher en
dc.identifier.ncid AA12222093 en
dc.identifier.jtitle EURASIP Journal on Advances in Signal Processing en
dc.identifier.volume 2007 en
dc.identifier.issue 1 en
dc.identifier.spage 56 en
dc.identifier.epage 56 en
dc.relation.doi 10.1155/2007/94068 en
dc.identifier.artnum 094068 en

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