Wireless earplug with improved sensitivity and form factor
First Claim
Patent Images
1. A wireless communications earplug for use with a magnetic field transmitter, comprising:
- a) a receiver comprising a bobbin made of magnetic material having two ends and a length therebetween, and a coil of wire wound upon the length of the bobbin; and
b) a speaker having a case with at least a top surface made of magnetic material, an acoustic output and an electrical input coupled to the wire of the receiver,wherein an end of the bobbin of the receiver is mounted in close proximity to the top surface of the case of the speaker, the bobbin of the receiver being oriented relative to the magnetic material of the top surface of the case of the speaker such that the magnetic bobbin of the receiver and the magnetic material of the case of the speaker provide a low-reluctance path for magnetic flux passing through the bobbin and the coil of the receiver, and directing magnetic flux from the magnetic field transmitter through the receiver, such that the sensitivity of the earplug is improved, requiring less power from the transmitter for the same output level from the receiver.
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Abstract
An improved wireless communications earplug for use with a magnetic field transmitter. The wireless earplug has a receiver made of a coil of wire on a magnetic bobbin, mounted in close proximity or in contact with a magnetic case of a speaker. The magnetic case of the speaker serves to increase the magnetic flux through the receiver and improves the efficiency of the earplug. The speaker is acoustically coupled to an eartip, and the earplug may be molded into a custom earplug body.
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Citations
17 Claims
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1. A wireless communications earplug for use with a magnetic field transmitter, comprising:
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a) a receiver comprising a bobbin made of magnetic material having two ends and a length therebetween, and a coil of wire wound upon the length of the bobbin; and b) a speaker having a case with at least a top surface made of magnetic material, an acoustic output and an electrical input coupled to the wire of the receiver, wherein an end of the bobbin of the receiver is mounted in close proximity to the top surface of the case of the speaker, the bobbin of the receiver being oriented relative to the magnetic material of the top surface of the case of the speaker such that the magnetic bobbin of the receiver and the magnetic material of the case of the speaker provide a low-reluctance path for magnetic flux passing through the bobbin and the coil of the receiver, and directing magnetic flux from the magnetic field transmitter through the receiver, such that the sensitivity of the earplug is improved, requiring less power from the transmitter for the same output level from the receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A communications system comprising:
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a) a magnetic field transmitter; b) a receiver comprising a bobbin made of magnetic material having two ends and a length therebetween, and a coil of wire wound upon the length of the bobbin; and c) a speaker having a case with at least a top surface made of magnetic material, an acoustic output and an electrical input coupled to the wire of the receiver, wherein an end of the bobbin of the receiver is mounted in close proximity to the top surface of the case of the speaker, to increase the bobbin of the receiver being oriented relative to the magnetic material of the top surface of the case of the speaker such that the magnetic bobbin of the receiver and the magnetic material of the case of the speaker provide a low-reluctance path for magnetic flux passing through the bobbin and the coil of the receiver, and directing magnetic flux from the magnetic field transmitter through the receiver, such that the sensitivity of the earplug is improved, requiring less power from the transmitter for the same output level from the receiver. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification