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PhD Thesis(Eurasip PhD Library)

Output SNR analysis of integrated active noise control and noise reduction in hearing aids under a single speech source scenario



Authors: Romain Serizel, Marc Moonen, Jan Wouters, Søren Holdt Jensen

Reference: in Signal Processing (EURASIP), Vol. 91, No. 8, Aug. 2011., pp 1719-1729

Status: Published (International Journal)

Internal Report: 10-196

Abstract:
This paper analyses the output signal-to-noise ratio for a standard noise reduction scheme based on the multichannel Wiener filter and for an integrated active noise control and noise reduction scheme based on the filtered-X multichannel Wiener filter, both applied in a hearing aid framework that includes the effects of signal leakage through an open fitting and secondary path effects. In previous work, integrating noise reduction and active noise control has been shown to allow to compensate for effects of signal leakage and secondary path effects. These experimental results are now verified theoretically. The output signal-to-noise ratios are derived under a single speech source scenario. Theoretical results are then compared to simulations for a single noise source scenario and a multiple noise sources scenario.

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