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[An implantable microphone for electronic hearing aids]

H Leysieffer1, G Müller, H P Zenner

  • 1Universitätsklinik für Hals-Nasen-Ohrenheilkunde, Tübingen.

HNO
|January 31, 1998
PubMed
Summary

Future implantable hearing aids need a tiny, hermetically sealed microphone. This new device is smaller, lighter, and performs as well as or better than existing models, paving the way for advanced audiology.

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Area of Science:

  • Biomedical Engineering
  • Acoustics
  • Materials Science

Context:

  • The development of fully implantable hearing aids and cochlear implants necessitates miniaturized, biocompatible microphones.
  • Existing implantable microphone technology presents limitations in size and performance.

Purpose:

  • To present a novel, hermetically sealed implantable microphone optimized for size and performance.
  • To achieve significant miniaturization while maintaining or exceeding current performance benchmarks for audiological devices.

Summary:

  • A hermetically sealed implantable microphone with a 4.5 mm membrane diameter and 0.4 g weight has been developed.
  • The device exhibits a bandwidth of approximately 10 kHz, a sound-pressure transfer factor of 1.5 mV/Pa, and high insensitivity to mechanical and electromagnetic disturbances.
  • Constructed from pure titanium and hermetically sealed to Mil-Std 883 D, it offers robust protection and longevity.

Impact:

  • Enables the next generation of fully implantable hearing solutions, potentially improving audiological device aesthetics and functionality.
  • Offers superior performance and durability compared to existing implantable microphones, reducing the need for revisions.
  • Advances the field of miniaturized medical device technology with applications beyond audiology.

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