title: In-ear microphone speech quality enhancement via adaptive filtering and artificial bandwidth extension.
abstract: Bone and tissue conducted speech has been used in noisy environments to provide a relatively high signal-to-noise ratio signal. However, the limited bandwidth of bone and tissue conducted speech degrades the quality of the speech signal. Moreover in very noisy conditions, bandwidth extension of the bone and tissue conducted speech becomes problematic. In this paper, speech generated from bone and tissue conduction captured using an in-ear microphone is enhanced using adaptive filtering and a non-linear bandwidth extension method. Objective and subjective tests are used to evaluate the performance of the proposed techniques. Both evaluations show a statistically significant quality enhancement of the noisy in-ear microphone speech with ρ<0.0001 after denoising and ρ<0.01 after bandwidth extension.
authors.affiliation: Department of Mechanical Engineering, École de technologie supérieure, Montréal, Quebec H3C 1K3 Canada.
authors.forename: Rachel E
authors.initials: RE
authors.lastname: Bouserhal
authors.affiliation: Centre Énergie, Matériaux, Télécommunications, Institut National de la Recherche Scientifique, Montréal, Quebec H5A 1K6, Canada.
authors.forename: Tiago H
authors.initials: TH
authors.lastname: Falk
authors.affiliation: Department of Mechanical Engineering, École de technologie supérieure, Montréal, Quebec H3C 1K3 Canada.
authors.forename: Jérémie
authors.initials: J
authors.lastname: Voix