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This article is part of the series Digital Signal Processing for Hearing Instruments.

Open Access Research Article

The Personal Hearing System—A Software Hearing Aid for a Personal Communication System

Giso Grimm1*, Gwénaël Guilmin2, Frank Poppen3, Marcel SMG Vlaming4 and Volker Hohmann15

Author Affiliations

1 , Medizinische Physik, Carl-von-Ossietzky Universität Oldenburg, 26111 Oldenburg, Germany

2 THALES Communications, 92704 Colombes Cedex, France

3 OFFIS e.V., 26121 Oldenburg, Germany

4 ENT/Audiology, EMGO Institute, VU University Medical Center, 1007 MB Amsterdam, The Netherlands

5 HörTech gGmbH, 26129 Oldenburg, Germany

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EURASIP Journal on Advances in Signal Processing 2009, 2009:591921  doi:10.1155/2009/591921


The electronic version of this article is the complete one and can be found online at: http://asp.eurasipjournals.com/content/2009/1/591921


Received:15 December 2008
Revisions received:27 March 2009
Accepted:6 July 2009
Published:26 August 2009

© 2009 The Author(s).

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A concept and architecture of a personal communication system (PCS) is introduced that integrates audio communication and hearing support for the elderly and hearing-impaired through a personal hearing system (PHS). The concept envisions a central processor connected to audio headsets via a wireless body area network (WBAN). To demonstrate the concept, a prototype PCS is presented that is implemented on a netbook computer with a dedicated audio interface in combination with a mobile phone. The prototype can be used for field-testing possible applications and to reveal possibilities and limitations of the concept of integrating hearing support in consumer audio communication devices. It is shown that the prototype PCS can integrate hearing aid functionality, telephony, public announcement systems, and home entertainment. An exemplary binaural speech enhancement scheme that represents a large class of possible PHS processing schemes is shown to be compatible with the general concept. However, an analysis of hardware and software architectures shows that the implementation of a PCS on future advanced cell phone-like devices is challenging. Because of limitations in processing power, recoding of prototype implementations into fixed point arithmetic will be required and WBAN performance is still a limiting factor in terms of data rate and delay.

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