Patent US5557673A successfully refreshed from Google Patents.
US5557673A
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US
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Auditory assistance apparatus and method
Assignee: AVR Communications Ltd
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Filing: 1994-10-25
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Granted: 1996-09-17
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Expires: 2014-10-25
Abstract
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.
Inventors
- 👤 Boris Ginzburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:12
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/55; H04R25/554; H04M; H04M1/00; H04M1/02; H04M1/21; H04M1/215; H04R2225/00; H04R2225/51
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
142 words
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.
Claim 2
Dependent Claim
142 words
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.
Claim 3
Dependent Claim
20 words
The apparatus according to claim 1, further including a manual electrical switch for manually shunting one of said pickup coils.
Claim 4
Dependent Claim
18 words
The apparatus according to claim 1, wherein the magnetic axes of the pair of pickup coils are coaxial.
Claim 5
Dependent Claim
20 words
The apparatus according to claim 1, in combination with a sound signal source in the form of a telephone speaker.
Claim 6
Dependent Claim
24 words
The apparatus according to claim 1, in combination with a sound signal source in the form of a dynamic speaker having a magnetic core.
Claim 7
Dependent Claim
29 words
The apparatus according to claim 1, in combination with a sound signal source in the form of a telephone speaker incorporated into the receiver/earpiece section of a telephone handset.
Claim 8
Dependent Claim
19 words
The apparatus according to claim 1, wherein said audio transducer is connected to said amplifier by a wire connection.
Claim 9
Dependent Claim
40 words
The apparatus according to claim 1, wherein said audio transducer is connected to said amplifier by a transmitter transmitting the output of said amplifier, and a receiver receiving and amplifying said transmitted output and connecting same to said audio transducer.
Claim 10
Dependent Claim
24 words
The apparatus according to claim 8, wherein said receiver and audio transducer are incorporated in a hearing aid to be worn by a user.
Claim 11
Dependent Claim
24 words
The apparatus according to claim 9, wherein said pair of pickup coils, amplifier and transmitter are incorporated in the speaker of a telephone handset.
Claim 12
Independent Claim
129 words
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.
Claim 13
Independent Claim
129 words
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.
Claim 14
Dependent Claim
27 words
The method according to claim 11, wherein said pair of pickup coils are located a distance of no more than 3 cm from said sound signal source.
Claim 15
Dependent Claim
24 words
The method according to claim 11, wherein said pair of pickup coils are located a distance of less than 3 cm from each other.
Claim 16
Dependent Claim
15 words
The method according to claim 11, wherein said sound signal source is a telephone speaker.
Claim 17
Dependent Claim
19 words
The method according to claim 11, wherein said sound signal source is a dynamic speaker having a magnetic core.
Claim 18
Dependent Claim
24 words
The method according to claim 11, wherein said sound signal source is a telephone speaker incorporated into the receiver/earpiece section of a telephone handset.
Claim 19
Dependent Claim
19 words
The method according to claim 11, wherein said audio transducer is connected to said amplifier by a wire connection.
Claim 20
Dependent Claim
40 words
The method according to claim 11, wherein said audio transducer is connected to said amplifier by a transmitter transmitting the output of said amplifier, and a receiver receiving and amplifying said transmitted output and connecting same to said audio transducer.
Claim 21
Dependent Claim
24 words
The method according to claim 18, wherein said receiver and audio transducer are incorporated in a hearing aid to be worn by a user.
Claim 22
Dependent Claim
24 words
The method according to claim 19, wherein said pair of pickup coils, amplifier and transmitter are placed near the speaker of a telephone handset.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-09-17 | 2000-03-18 | 2000-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-17 | 2004-03-18 | 2004-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-17 | 2008-03-18 | 2008-09-17 | $7700.00 | Window Closed / Lapsed |