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SO WHO NEEDS EARS?
Bob Brown (Deafly serious) 

 

INTRODUCTION

In most cases, hearing aids are a big help for hearing-impaired people, but they do have some serious limitations. If several people are talking, or if there is other background sounds present, the hearing-impaired may hear the mixture of sounds as garbled noise. Of course hearing aids will not help completely deaf people at all.

The following is a description of an invention that should work for both hearing-impaired people and completely deaf people. With this proposed system, sound signals will bypass the ears all together. No surgical procedure or physical invasion of the body will be required. The user will carry a packet of electronics and a body strip. Both items can be concealed.

 DESCRIPTION

A small receiver in the pocket of a hearing-impaired person will receive sound signals. So far this is like existing hearing aids, but the similarity ends there. Suitable electronics will divide the received frequencies into a limited number of discrete ranges. A single signal will represent the output for each range. For example, one signal may represent a 6.0 to 6.5 kilocycle sound frequency and the next signal may represent a 6.5 to 7.0 kilocycle sound frequency, etc.. Each signal (representing its discrete range) is then sent to a stimulator. A string of such stimulators will be mounted on a cloth strip in the order of the frequency range that they represent. The lowest frequency range stimulator would therefore be on one end of the strip and the highest frequency range stimulator would be on the other end of the strip. This strip containing the stimulators will then be wrapped around hearing-impaired person’s waist, or spiral around their arm or leg. The strip may spiral about the chest, or leg, more than once. Velcro might be suitable for holding the strip in position.

When the electronics detects a sound frequency it will activate only the stimulator that corresponds to its range of frequencies. The stimulator must be such that a person can feel it on their skin when it is activated. The hearing-impaired will associate which frequency range was activated by knowing its location on the strip. The volume would be determined by the intensity of activation. Twenty stimulators may be a good number to experiment with. They may need to be spaced two or three inches apart since they are not on position sensitive parts of the body. Stimulators may be mechanical, vacuum/pressure, or heat/cold activated. See figure for a suggested stimulator design. Experiments will be necessary to develop stimulators that are comfortable, effective, and that do not tickle or irritate the skin.

Suggested stimulator design (greatly enlarged).

LEARNING CURVE

On first use, a hearing-impaired person will probably not make any sense of the signals they receive from the stimulators. After all, this is entirely different from nature’s way of hearing. There will be a learning process. Just as it takes time for babies to learn to talk and hear with any comprehension. However, with persistence, it is expected that a person will intuitively make the correlation of the sound frequency and the location of the signal they receive from the stimulator. If the person is not completely deaf, hearing and feeling the stimulators simultaneously should induce faster learning. Closed caption TV might also be useful in correlating the spoken word with the stimulators, especially with the totally deaf. Closed caption would allow the person to gradually turn the TV sound down, or off, or turn the closed caption off to access how well they are learning the system.

Accidentally torn shirt reveal that Jake is deaf as a gourd.

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