Two-way communications earset
First Claim
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1. A one piece two-way simultaneous voice transmitting and receiving device comprising:
- a receiver for emitting sound primarily to the ear canal of a user; and
a transmitter, coupled to the receiver, comprising;
a first microphone for sound pickup adapted to be located outside the ear canal at a first position relative to the mouth of the user and outputting a first signal; and
a second microphone for sound pickup spaced from the first microphone and adapted to be located outside the ear canal at a second position relative to the mouth of the user farther from the mouth of the user than the first position and outputting a second signal;
subtracting means, coupled to the first and second microphones, for subtracting one of the first and second signals from the other and for outputting a third signal with a degree of amplification; and
reducing means, coupled to the subtracting means, for reducing the degree of amplification of the third signal to a first extent if a sound level at said transmitter means is greater than a selected threshold and for reducing the degree of amplification of the third signal to a greater extent than the first extent when the sound level is less than the selected threshold.
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Abstract
A one piece two way voice communications earset which is situated in or at the ear of the user and which includes either two unidirectional microphones having their outputs combined or a single bi-directional microphone.
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Citations
3 Claims
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1. A one piece two-way simultaneous voice transmitting and receiving device comprising:
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a receiver for emitting sound primarily to the ear canal of a user; and a transmitter, coupled to the receiver, comprising; a first microphone for sound pickup adapted to be located outside the ear canal at a first position relative to the mouth of the user and outputting a first signal; and a second microphone for sound pickup spaced from the first microphone and adapted to be located outside the ear canal at a second position relative to the mouth of the user farther from the mouth of the user than the first position and outputting a second signal; subtracting means, coupled to the first and second microphones, for subtracting one of the first and second signals from the other and for outputting a third signal with a degree of amplification; and reducing means, coupled to the subtracting means, for reducing the degree of amplification of the third signal to a first extent if a sound level at said transmitter means is greater than a selected threshold and for reducing the degree of amplification of the third signal to a greater extent than the first extent when the sound level is less than the selected threshold. - View Dependent Claims (2)
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3. A one piece two-way simultaneous voice transmitting and receiving device comprising:
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an ear cover adapted to hang at the auricle of a user'"'"'s ear; a speaker attached to an inside portion of the ear cover and facing the entrance of the user'"'"'s ear canal; a transmitter, coupled to an outside portion of said ear cover, comprising; a first microphone for sound pickup adapted to be located outside the ear canal at a first position relative to the mouth of the user and outputting a first signal; and a second microphone for sound pickup spaced a distance away from the first microphone and adapted to be located outside the ear canal at a second position relative to the mouth of the user farther from the mouth of the user than the first position and outputting a second signal; subtracting means, coupled to the first and second microphones, for subtracting one of the first and second signals from the other and for outputting a third signal with a degree of amplification; and reducing means, coupled to the subtracting means, for reducing the degree of amplification of the third signal to a first extent if a sound level at said transmitter means is greater than a selected threshold and for reducing the degree of amplification of the third signal to a greater extent than the first extent when the sound level is less than the selected threshold.
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Specification