Denoising click-evoked otoacoustic emission signals by optimal shrinkage
نویسندگان
چکیده
Click-evoked otoacoustic emissions (CEOAEs) are clinically used as an objective way to infer whether cochlear functions normal. However, because the sound pressure level of CEOAEs is typically much lower than background noise, it usually takes hundreds, if not thousands repetitions estimate signal with sufficient accuracy. In this paper, we propose improve signal-to-noise ratio (SNR) CEOAE signals within limited measurement time by optimal shrinkage (OS) in two different settings: covariance-based OS (cOS) and singular value decomposition (SVD)-based (sOS). By simulation analyzing human data, cOS consistently reduced noise enhanced SNR 1 2 dB from a baseline method (BM) that based on calculating median. The sOS achieved enhancement 3 simulation, demonstrated capability enhance real recordings when BM was below 0 dB. An appealing property produces every individual column matrix. This makes possible investigate dynamics across longer period conditions strictly stationary.
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ژورنال
عنوان ژورنال: Journal of the Acoustical Society of America
سال: 2021
ISSN: ['0001-4966', '1520-9024', '1520-8524']
DOI: https://doi.org/10.1121/10.0004264