Appeal No. 1998-0743
Application 08/214,169
A hearing aid apparatus for receiving and transmitting to
the human sensory system information contained in an audio
frequency signal for enabling human sensing of information
contained in said audio frequency signal, comprising:
first transducer means for receiving and converting an
audio frequency sound signal into an audio frequency
electrical signal;
analog to digital converter means for converting said
audio frequency electrical signal to a digital audio frequency
electrical signal;
frequency shifting means for shifting the frequency band
of said digital audio frequency electrical signal from its
original frequency band to a different selected frequency band
to form a digital frequency shifted electrical signal,
including modulation means for modulating said digital audio
frequency electrical signal onto a carrier signal to form said
digital frequency shifted electrical signal, and means for
forming a digital single sideband amplitude modulated
frequency shifted signal from said digital frequency shifted
electrical signal;
digital to analog converter means for converting said
digital single sideband amplitude modulated frequency shifted
electrical signal to an analog frequency shifted electrical
signal;
second transducer means for converting said analog
frequency shifted electrical signal into a sensory signal for
application
to a portion of the human body; and
applicator means for applying said sensory signal to the
human sensory system through physical interaction with the
human body.
The references relied upon by the examiner as evidence of
obviousness are:
Kimball et al. (Kimball) 4,220,160 Sep. 02,
1980
Engebretson et al. (Engebretson) 4,548,082 Oct. 22,
1985
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