Fractional Delay Estimation for Blind Source Separation and Localization of Temporomandibular Joint Sounds.pdf (586.78 kB)
Fractional delay estimation for blind source separation and localization of temporomandibular joint sounds
journal contribution
posted on 2010-03-22, 11:03 authored by Clive Cheong Took, Saeid Sanei, Scott Rickard, Jonathon Chambers, Stephen DunneTemporomandibular joint (TMJ) sound sources are
generated from the two joints connecting the lower jaw to the
temporal bone. Such sounds are important diagnostic signs in
patients suffering from temporomandibular disorder (TMD).
In this study, we address the problem of source separation of
the TMJ sounds. In particular, we examine patients with only
one TMJ generating “clicks.” Thereafter, we consider the TMJ
sounds recorded from the two auditory canals as mixtures of
clicks from the TMD joint and the noise produced by the other
healthy/normal TMJ.We next exploit the statistical nonstationary
nature of the TMJ signals by employing the degenerate unmixing
estimation technique (DUET) algorithm, a time–frequency (T–F)
approach to separate the sources. As the DUET algorithm requires
the sensors to be closely spaced, which is not satisfied by
our recording setup, we have to estimate the delay between the
recorded TMJ sounds to perform an alignment of the mixtures.
Thus, the proposed extension of DUET enables an essentially
arbitrary separation of the sensors. It is also shown that DUET
outperforms the convolutive Infomax algorithm in this particular
TMJ source separation scenario. The spectra of both separated
TMJ sources with our method are comparable to those available
in existing literature. Examination of both spectra suggests that
the click source has a better audible prominence than the healthy
TMJ source. Furthermore, we address the problem of source
localization. This can be achieved automatically by detecting the
sign of our proposed mutual information estimator which exhibits
a maximum at the delay between the two mixtures. As a result,
the localized separated TMJ sources can be of great clinical value
to dental specialists.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Citation
TOOK, C.C. ... et al., 2008. Fractional delay estimation for blind source separation and localization of temporomandibular joint sounds. IEEE Transactions on Biomedical Engineering, 55 (3), pp 949-946.Publisher
© IEEEVersion
- VoR (Version of Record)
Publication date
2008Notes
This article was published in the journal IEEE Transactions on Biomedical Engineering [© IEEE] and is also available at: http://ieeexplore.ieee.org/ Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.ISSN
0018-9294Language
- en