Importance

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Abstract

A hearing aid having a comparator or comparators which compare speech sound signals obtained by a first transducer with reference voltage(s) as slice level(s) formed from a standard voltage and which output time series square wave containing frequency information according to the relations of amplitude between the speech sound signals and the slice level(s). The time series square wave is output as mechanical vibrations, which is easy to adjust the level for hearing impaired persons having a narrow dynamic range. Comparators may be provided for both positive and negative sides and may be divided into plural numbers in order to raise the identification score and information content.

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First Claim