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Radio frequency hearing: electrostrictive detection and bone conduction

¹Department of Applied Physics, Yale University, New Haven, Connecticut 06520-8284, USA.

The Journal of the Acoustical Society of America

|May 5, 1998

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This study reveals Schafer

Area of Science:

Audiology
Biophysics
Biomedical Engineering

Background:

The C. R. Schafer hearing aid was patented with a proposed mechanism involving amplitude-modulated carrier wave detection in the auditory cortex.
Previous understanding of the device's function lacked empirical validation.

Purpose of the Study:

To re-examine the functional mechanism of the C. R. Schafer hearing aid.
To determine the actual method of sound conduction and signal detection employed by the device.

Main Methods:

Re-examination of the patented hearing aid design and operational principles.
Analysis of sound conduction pathways.
Investigation of signal detection mechanisms within biological tissues.

Main Results:

Related Experiment Videos

The C. R. Schafer hearing aid operates via bone conduction of sound, not auditory cortex modulation detection.
The device utilizes electrical nonlinearities and electrostriction within facial and skull bones for signal detection.

Conclusions:

The purported mechanism of the Schafer hearing aid is incorrect.
The device's efficacy relies on physical phenomena within bone structures for sound processing.