A search for the electrophonic phenomena in the microwatt power domain
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Authors
Johnson, Patrick Woodruff
Subjects
Electrical stimulation of audition
Electroaudition
Electrophonic hearing
Transdermal stimulation
Hearing
Cochlear microphonics
Electrical-aural transduction
Electroaudition
Electrophonic hearing
Transdermal stimulation
Hearing
Cochlear microphonics
Electrical-aural transduction
Advisors
Ewing, Gerald D.
Date of Issue
1971-06
Date
June 1971
Publisher
Monterey, California ; Naval Postgraduate School
Language
en_US
Abstract
The physiological sensation of hearing can be stimulated by an alternating current applied to the head using small electrodes. The major disadvantages of systems of this type have been the large magnitude of driving voltage required, - 100 to 4000 volts, and the magnitude of power dissipated in the head, - l watt.
The objectives of the paper were to investigate the basic phenomena and to attempt to find a low power method for production.
Previous successful experiments were reproduced during the basic investigation phase. Selected combinations of signal types and electrodes were then tested.
An extremely low·power mode of operation was found and documented. Threshold values for a single tone were found to be in the order of 10µ A at 10µWatt making an extremely small
low cost hearing aid a possible application.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.