Low-feedback compact wireless telephone
First Claim
1. A wireless telephone for use with a base station, the wireless telephone comprising:
- a telephone body member having a fixed configuration;
a directional speaker connected to a speaker interface circuit positioned within the telephone body member;
a directional microphone connected to a microphone interface circuit positioned within the telephone body member;
a wireless interface circuit for interfacing with the base station, the wireless interface circuit positioned within the telephone body member; and
a controller connected to the microphone interface circuit, the speaker interface circuit and the wireless interface circuit positioned within a telephone body member;
wherein the directional speaker is positioned such that sound generated by the speaker radiates predominately in a first direction,wherein the directional microphone is fixed in a position so as to be most sensitive to sound arriving from a second direction approximately 90 degrees offset from the first direction,wherein the telephone body member encompasses the directional speaker, the directional speaker interface circuit, the directional microphone, the directional microphone interface circuit, the wireless interface circuit, and the controller within the telephone body member, andfurther wherein the wireless telephone is operable during standby and communication operations without manipulation of the telephone body member into another configuration different than the fixed configuration.
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Accused Products
Abstract
The present invention is directed to apparatus and methods for reducing sidetone feedback in a portable wireless telephone system by positioning the speaker and the microphone to reduce acoustic feedback and by controlling the amplifier gain in the transmitter section of the wireless telephone to reduce amplification of sidetone which has been acoustically coupled from the speaker to the microphone. The wireless telephone may be configured as a watch with a wrist strap for retaining it to the user, as a piece of jewelry such as a brooch or pendant, as a voice capable pager/intercom, or as an identification badge for an employee. In one embodiment, the base station includes circuitry for further reducing sidetone feedback. In additional embodiments, the wireless telephone may include a quick-release outboard battery, a retractable earpiece, and an ergonomic keypad.
44 Citations
10 Claims
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1. A wireless telephone for use with a base station, the wireless telephone comprising:
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a telephone body member having a fixed configuration; a directional speaker connected to a speaker interface circuit positioned within the telephone body member; a directional microphone connected to a microphone interface circuit positioned within the telephone body member; a wireless interface circuit for interfacing with the base station, the wireless interface circuit positioned within the telephone body member; and a controller connected to the microphone interface circuit, the speaker interface circuit and the wireless interface circuit positioned within a telephone body member; wherein the directional speaker is positioned such that sound generated by the speaker radiates predominately in a first direction, wherein the directional microphone is fixed in a position so as to be most sensitive to sound arriving from a second direction approximately 90 degrees offset from the first direction, wherein the telephone body member encompasses the directional speaker, the directional speaker interface circuit, the directional microphone, the directional microphone interface circuit, the wireless interface circuit, and the controller within the telephone body member, and further wherein the wireless telephone is operable during standby and communication operations without manipulation of the telephone body member into another configuration different than the fixed configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification