Patent No. 6426919 Portable and hand-held device for making humanly audible sounds responsive to the detecting of ultrasonic sounds
Patent No. 6426919
Portable and hand-held device for making humanly audible sounds responsive to the detecting of ultrasonic sounds (Gerosa, Jul 30, 2002)
Abstract
A portable and hand-held device for making humanly audible sounds responsive to the detecting of ultrasonic sounds. The device includes a hand-held housing and circuitry that is contained in the housing. The circuitry includes a microphone that receives the ultrasonic sound, a first low voltage audio power amplifier that strengthens the signal from the microphone, a second low voltage audio power amplifier that further strengthens the signal from the first low voltage audio power amplifier, a 7-stage ripple carry binary counter that lowers the frequency of the signal from the second low voltage audio power amplifier so as to be humanly audible, a third low voltage audio power amplifier that strengthens the signal from the 7-stage ripple carry binary counter, and a speaker that generates a humanly audible sound from the third low voltage audio power amplifier.
Notes:
SUMMARY
OF THE INVENTION
ACCORDINGLY, AN OBJECT of the present invention is to provide a portable and
hand-held device for detecting, and making humanly audible, ultrasonic sounds
that avoids the disadvantages of the prior art.
ANOTHER OBJECT of the present invention is to provide a portable and hand-held
device for detecting, and making humanly audible, ultrasonic sounds that is
simple and inexpensive to manufacture.
STILL ANOTHER OBJECT of the present invention is to provide a portable and hand-held
device for detecting, and making humanly audible, ultrasonic sounds that is
simple to use.
BRIEFLY STATED, STILL YET ANOTHER OBJECT of the present invention is to provide
a portable and hand-held device for detecting, and making humanly audible, ultrasonic
sounds. The device includes a hand-held housing and circuitry that is contained
in the housing. The circuitry includes a microphone that receives the ultrasonic
sound, a first low voltage audio power amplifier that strengthens the signal
from the microphone, a second low voltage audio power amplifier that further
strengthens the signal from the first low voltage audio power amplifier, a 7-stage
ripple carry binary counter that lowers the frequency of the signal from the
second low voltage audio power amplifier so as to be humanly audible, a third
low voltage audio power amplifier that strengthens the signal from the 7-stage
ripple carry binary counter, and a speaker that generates a humanly audible
sound from the third low voltage audio power amplifier.
The novel features which are considered characteristic of the present invention
are set forth in the appended claims. The invention itself, however, both as
to its construction and its method of operation, together with additional objects
and advantages thereof, will be best understood from the following description
of the specific embodiments when read and understood in connection with the
accompanying drawing.
---------------------------
It
will be understood that each of the elements described above, or two or more
together, may also find a useful application in other types of constructions
differing from the types described above.
While the invention has been illustrated and described as embodied in a portable
and hand-held device for detecting, and making humanly audible, ultrasonic sounds,
however, it is not limited to the details shown, since it will be understood
that various omissions, modifications, substitutions and changes in the forms
and details of the device illustrated and its operation can be made by those
skilled in the art without departing in any way from the spirit of the present
invention.
Without further analysis, the foregoing will so fully reveal the gist of the
present invention that others can, by applying current knowledge, readily adapt
it for various applications without omitting features that, from the standpoint
of prior art, fairly constitute characteristics of the generic or specific aspects
of this invention.
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