Auditory assistance apparatus and method
First Claim
1. An auditory assistance apparatus for use with a sound signal source which also produces a magnetic field propagated along a magnetic field axis, said auditory assistance apparatus, comprising:
- a pair of magnetic pickup coils of substantially the same electrical and magnetic parameters, but of opposite polarity, to be located close to said sound signal source;
said pair of coils being electrically connected together in series and being mounted on separate cores having parallel axes oriented symmetrically with respect to the geometrical axis of the auditory assistance apparatus with the axes of the cores substantially perpendicular to said magnetic field axis of the sound signal source and said geometrical axis of the auditory assistance apparatus;
an amplifier connected to receive the outputs of said pair of series-connected pickup coils;
and an audio transducer connected to said amplifier for converting its output to sound.
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Accused Products
Abstract
An auditory assistance apparatus and method for use with a sound signal source which also produces a magnetic field propagated along a magnetic field axis to increase the signal-to-noise ratio with respect to ambient noise. A pair of magnetic pickup coils of substantially the same electrical and magnetic parameters, but of opposite polarity, are located close to the sound signal source and oriented symmetrically with respect to the geometrical axis of the auditory assistance apparatus with the magnetic axes of the pickup coils substantially parallel to each other and substantially perpendicular to the magnetic field axis of the sound signal source and the geometrical axis of the auditory assistance apparatus; and an amplifier which adds and amplifies the outputs of the serially-connected pickup coils and feeds same to an audio transducer for conversion to sound.
24 Citations
20 Claims
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1. An auditory assistance apparatus for use with a sound signal source which also produces a magnetic field propagated along a magnetic field axis, said auditory assistance apparatus, comprising:
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a pair of magnetic pickup coils of substantially the same electrical and magnetic parameters, but of opposite polarity, to be located close to said sound signal source; said pair of coils being electrically connected together in series and being mounted on separate cores having parallel axes oriented symmetrically with respect to the geometrical axis of the auditory assistance apparatus with the axes of the cores substantially perpendicular to said magnetic field axis of the sound signal source and said geometrical axis of the auditory assistance apparatus; an amplifier connected to receive the outputs of said pair of series-connected pickup coils; and an audio transducer connected to said amplifier for converting its output to sound. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of increasing the signal-to-noise ratio of a sound signal source which also produces a magnetic field propagated along a magnetic field axis, comprising:
- providing a pair of magnetic pickup coils of substantially the same electrical and magnetic parameters, but of opposite polarity, which coils are electrically connected together in series and are mounted on separate cores;
locating said pair of magnetic pickup coils and their respective cores close to said sound signal source and oriented symmetrically with respect to each other with their core axes substantially parallel to each other and substantially perpendicular to the magnetic field axis of the sound signal source axis;
adding and amplifying the outputs of the pair of pickup coils in an amplifier; and
converting the outputs of said amplifier to sound. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
- providing a pair of magnetic pickup coils of substantially the same electrical and magnetic parameters, but of opposite polarity, which coils are electrically connected together in series and are mounted on separate cores;
Specification