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  • Research Article
  • Open Access

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

  • 1Email author,
  • 2,
  • 3,
  • 4 and
  • 1, 5
EURASIP Journal on Advances in Signal Processing20092009:591921

  • Received: 15 December 2008
  • Accepted: 6 July 2009
  • Published:


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.


  • Central Processor
  • Wireless Body Area Network
  • Speech Enhancement
  • Public Announcement
  • Enhancement Scheme

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Authors’ Affiliations

Medizinische Physik, Carl-von-Ossietzky Universität Oldenburg, 26111 Oldenburg, Germany
THALES Communications, 92704 Colombes Cedex, France
OFFIS e.V., 26121 Oldenburg, Germany
ENT/Audiology, EMGO Institute, VU University Medical Center, 1007 MB Amsterdam, The Netherlands
HörTech gGmbH, 26129 Oldenburg, Germany


© Giso Grimm et al. 2009

This article is published under license to BioMed Central Ltd. 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.