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A Real-Time Hearing-Aid Research Platform (HARP): Realization, Calibration, and Evaluation

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In current hearing aid (HA) research and development a real-time HA platform is often required to perform highly controlled manipulations of the considered signal processing as well as the signal presentation to the listener's ears. Although a large number of possible hardware and software solutions have been described in the relevant literature, very few studies exist that provide a coherent description of all the concepts, techniques and strategies that are involved in realizing an entire HA platform. The present study therefore provides a detailed description of all the methods that were applied for one example HA platform realization. The descriptions include: (i) the required hardware and software to realize and calibrate the HA platform, (ii) the equalization and calibration of the applied hardware from the sound signals picked up by the HA microphones to the signals at the ears of an individual listener, (iii) the implementation of an example multi-channel wide dynamic-range compressor that can be directly applied in HA research, (iv) the fitting to a given hearing loss, and (v) the evaluation of the temporal and spectral behaviour of the example compressor.
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Document Type: Research Article

Publication date: May 1, 2013

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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