Multi-Channel Dynamic-Range Compression Techniques for Hearing Devices

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dc.contributor.advisorPanahi, Issa M. S.
dc.creatorZou, Ziyan
dc.date.accessioned2019-04-28T22:18:42Z
dc.date.available2019-04-28T22:18:42Z
dc.date.created2018-08
dc.date.issued2018-08
dc.date.submittedAugust 2018
dc.date.updated2019-04-28T22:18:43Z
dc.description.abstractDynamic-range compression (DRC) is an important component in hearing aid devices (HADs). Research of multi-channel DRC design and real-time implementation has been carried out in the last few decades. The trade-offs of every DRC system include the frequency resolution, computational complexity and processing time delay. In this thesis, a crossover filter bank based nine-channel DRC with an optimized structure is proposed. A polyphase extension of this approach is then applied and a compensation filter is proposed to reduce the distortion. Then a subband filter bank is designed and implemented for multi-channel DRC to reduce the computational complexity. The final method to optimize a multi-channel DRC is to use Equalization technique in frequency domain, which further reduces the computational complexity. In this work, all the methods are implemented on a smartphone to work as an assistive device to hearing aids. Objective and subjective evaluation of the developed methods show the improvement in quality and intelligibility.
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/10735.1/6397
dc.language.isoen
dc.subjectCompression (Audiology)
dc.subjectSmartphones
dc.subjectHearing aids
dc.subjectEqualizers (Electronics)
dc.titleMulti-Channel Dynamic-Range Compression Techniques for Hearing Devices
dc.typeThesis
dc.type.materialtext
thesis.degree.departmentElectrical Engineering
thesis.degree.grantorThe University of Texas at Dallas
thesis.degree.levelMasters
thesis.degree.nameMSEE

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