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Implantable Hearing Devices for Conductive and Sensorineural Hearing Impairment

Chapter
Part of the Springer Handbook of Auditory Research book series (SHAR, volume 39)

Abstract

Some degree of hearing loss affects 10 to 15% of the general population. The prevalence increases with age. More than one third of 70-year-old persons have hearing loss in excess of 30 dB HL (Hearing Loss), which makes them eligible for hearing aids. Although introduction of digital signal processing in acoustic hearing aids in the late 1990s has led to wider acceptance, owing to improved sound quality and comfort, only 20 to 25% of hearing impaired subjects are satisfied with their hearing aids. There are several medical and technological limitations that are responsible for this low acceptance rate of the acoustic hearing aids. The medical conditions limiting the use of acoustic hearing aids include chronic external otitis, chronic middle ear disease, or presence of profound hearing loss. The technological limitations are often related to the use of ear molds in these aids, including occlusion of the ear canal, leading to complaints about the user’s own voice, annoying feedback as a result of high amplification and acoustic leakage, and undesirable blockage of residual hearing at low frequencies. A final reason for the low acceptance rate of acoustic hearing aids is social stigma associated with being perceived old or handicapped.

Keywords

Hearing Loss Ossicular Chain Functional Gain Mixed Hearing Loss Acoustic Device 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

I would like to express my sincere thanks to my colleagues Cor Cremers, Emmanuel Mylanus, Arjan Bosman, Jef Mulder, Myrthe Hol, and Carine Hendriks for their support through the years.

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© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Department of OtorhinolaryngologyRadboud University Medical CentreNijmegenthe Netherlands

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