Telephone headset structure for reducing ambient noise
First Claim
1. In a telephonic headset comprising a speech transmitter, at least one speech-receiving ear-mounted speaker and an error microphone including a directional port for receiving ambient noise, the improvement comprising:
- a substantially cylindrical housing for mounting said error microphone and said speaker, said housing comprisinga bottom chambera top chamber separated by a baffle from said lower chamber and comprisinga cylindrical wall,a plurality of port openings in said wall,an exterior flange encircling said top chamber above said ports;
a domed extension of said top chamber rising above said flange, said extension comprising a plurality of spokes, the space between said spokes defining voids for passing of desired speech and noise-cancelling signals;
a flattened platform in the center of said dome having an opening for exposing said error microphone into direct physical presence in the user'"'"'s ear; and
means for mounting said speaker and error microphone in said top chamber such that said directional port of said microphone is aligned substantially perpendicular to the axis of propagation of said speaker.
1 Assignment
0 Petitions
Accused Products
Abstract
Telephone headsets used by operators and airline pilot headsets are subject to substantial amounts of interfering ambient noise which detract from the intelligibility of incoming speech. Noise reduction circuitry does not altogether eliminate the interfering sound. A headset speaker and error microphone housing are disclosed which enable a greater amount of unwanted noise elimination. The speaker and microphone are configured closely with respect to each other and also to the user'"'"'s ear. They are acoustically isolated in their own chamber. The microphone is located approximately on the speaker axis and protrudes substantially into the user'"'"'s ear; and also is disposed close to the speaker cone surface. Additional acoustical tuning features include venting ports in the housing, and acoustic damping padding at the microphone entrance and on either side of the speaker. These expedients enhance the ability of the noise-cancelling circuitry to effectively reduce the undesired noise heard by the user.
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Citations
10 Claims
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1. In a telephonic headset comprising a speech transmitter, at least one speech-receiving ear-mounted speaker and an error microphone including a directional port for receiving ambient noise, the improvement comprising:
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a substantially cylindrical housing for mounting said error microphone and said speaker, said housing comprising a bottom chamber a top chamber separated by a baffle from said lower chamber and comprising a cylindrical wall, a plurality of port openings in said wall, an exterior flange encircling said top chamber above said ports; a domed extension of said top chamber rising above said flange, said extension comprising a plurality of spokes, the space between said spokes defining voids for passing of desired speech and noise-cancelling signals; a flattened platform in the center of said dome having an opening for exposing said error microphone into direct physical presence in the user'"'"'s ear; and means for mounting said speaker and error microphone in said top chamber such that said directional port of said microphone is aligned substantially perpendicular to the axis of propagation of said speaker. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification