Plantronics, Inc.

Ooltewah Manufacturing, Inc.

David Glenn Lashley

Robert L Doss, Jr

Billy J Worley

John Pilozzi

Corina Sandulescu

Ronald Webber

Dutton Chris

Christopher F Smith

Systems and methods for reducing squealing or feedback on amplified telephones are disclosed. The telephone system generally includes a receiver in communication with a receive signal path, a transmitter in communication with a transmit signal path, a receiver gain detector configured to detect a receiver gain on the receive signal path, and a controller configured to operate the telephone system in full duplex when the receiver gain is approximately less than a receiver stability level and to operate the telephone system in adaptive duplex when the receiver gain is approximately above the receiver stability level. The adaptive duplex mode is such that an adaptive attenuation level alternately applied on the receive and transmit signal paths is dependent upon the level by which the receiver gain exceeds the receiver stability level.

Adaptive duplexing for amplified telephone

Systems and methods for a line amplifier circuit are disclosed. The line amplifier circuit generally includes a first microphone transmit line, a second microphone transmit line, and a light emitting diode with a controllable variable light output. A photo-resistor cell is coupled across the first microphone transmit line and the second microphone transmit line. The photo-resistor cell is operable to attenuate gain on the first microphone transmit line and the second transmit line responsive to the controllable variable light output from the light-emitting diode.

Isolated high gain line amplifier circuit

A wireless listening system includes a base operable to receive an electrical signal corresponding to an audio signal, including the ring of an incoming telephone call, up-convert the audio signal to an infrared signal, and transmit the infrared audio signal wirelessly therefrom, and a wireless headset operable to selectably receive either the infrared audio signal transmitted by the base, or an infrared signal corresponding to an audio signal transmitted by a public address system, down-convert the received signal back into the audio signal, and audibly reproduce the audio signal to a wearer of the headset. The system enables a hearing impaired listeners to enjoy their favorite audio programs without disturbing nearby persons with normal hearing and without missing an incoming telephone call, and is also compatible with public IR PA systems currently used to assist the hearing impaired community.

Wireless listening system

The present invention provides a microphone apparatus. The microphone apparatus includes a housing with an outer surface and an interior chamber. A microphone element is disposed within the interior chamber. The outer surface includes a first substantially planar surface having at least one aperture leading to the interior chamber and a second substantially planar surface intersecting at an angle with the first planar surface.

Microphone with reduced noise

Duplex communication methods and systems with maximum gain limiting such as in telephone handsets and speaker phones are disclosed. The communications system such as a telephone set may generally include a digital signal processor (DSP) having a receive and transmit path in communication with a receiver and a transmitter, respectively, a volume amplifier for amplifying signals on the receive path, and a maximum gain limiter for determining a total return loss between the receive and transmit paths and for limiting a volume amplification level of the volume amplifier to a maximum depending on the total return loss. The maximum gain limiter determines the total return loss by maintaining a total loop gain for the telephone set at less than 0 dB to prevent unstable operation and howling.

Limiting maximum gain in duplex communications devices including telephone sets

A DSP-enabled system and method for increasing intelligibility of audio on amplified telephones by providing digital audio processing customizable based on characteristics of hearing loss specific to individual end users are disclosed. The DSP-enabled amplified telephone generally comprises a DSP capable of implementing at least one digital processing mode for processing audio input, a volume control for allowing the user to select a volume control level, and a controller for interfacing between the DSP and the volume control. The DSP is optionally programmable to implement a processing mode selected from multiple processing modes that the DSP is capable of implementing. The mode is selected based upon the user's hearing loss characteristics. The DSP may be further customized by being programmed with frequency response, compression ratio, and/or knee point according to hearing loss characteristics of the user. The DSP may implement digital TILL, BILL, and/or PILL (treble, bass, and programmable increase at low levels, respectively), all of which apply more amplification to softer inputs than to louder inputs, as well as input compression, output compression, and/or finite impulse response (FIR) filter tone control.

DSP-enabled amplified telephone with digital audio processing

Systems and methods for remotely diagnosing, trouble shooting, and/or programming an end user telephone by a customer service representative using a telephone and modem system in communication with the user's telephone and modem system during a live telephone call between the customer service representative and the user are disclosed. The method for the user to obtain assistance from the customer service representative for the user system generally comprises initiating a telephone call to the representative, transmitting data signals containing information relating to the user system to the customer service system, speaking with the customer service representative, and receiving data signals that includes a command to control a remotely controllable feature of the user system from the customer service system, wherein the user and customer representative systems selectively alternate between data signal transmissions and voice signal transmissions.

Customer service process for remotely assisting users of telephone and modem systems

A full duplex telephone set for hearing impaired users includes a digital signal processor incorporating a pair of adaptive transversal filters to cancel line and acoustic echo feedback from the tip and ring signals of the set, and to condition and control the amount of a replacement side tone fed back to the receiver. This enables at least 50 dB of gain to be applied to the modified received signal without initiating unstable operation, or howl, in the set, and ensures that the received and side tone signals are heard by the user with equal comfort and clarity. The digital signal processor also enables additional enhancements to be made to the modified received signal that are beneficial to hearing impaired users, such as dynamic range compression, 'soft' limiting, and low level emphasis within selectable frequency bands.

Full duplex telephone set using echo cancellation and side tone management for high gain stability

Systems and methods for remotely diagnosing, trouble shooting, and/or programming an end user telephone by a customer service representative using a modem in communication with the user's telephone during a live telephone call between the customer service representative and the user are disclosed. The user telephone and modem system generally comprises a telephone having a remotely controllable feature and a user modem that alternates between voice and data signal transmissions and communicates with a remote customer service modem. The user modem receives control signals from the remote customer service modem for controlling the controllable feature of the user telephone. The user telephone may be a DSP-enabled telephone with the user modem being embodied in the DSP. Examples of remotely controllable features include volume, frequency response, compression ratio, knee point, programmable memory, an LED light, self-diagnostic test, and/or user hearing test administration. The user telephone may provide a customer support call button, activation of which causes the telephone to automatically connect with the remote customer support modem and transmit telephone identification data to the remote customer support modem.

Remotely controlled diagnostic telephone system with modem

A motorcycle helmet formed from an impact resistant shell for covering and protecting the head of a user has audio receiver members mounted on the interior of the shell and has a microphone at one end of a boom within the helmet. The microphone is located for use by the user at the front of the helmet while the boom has an adapter on the end opposite the microphone. The microphone has conductors communicating with a connector which communicates with the electrical energy source and control cables. The adapter is receivable within a socket formed by a channel in an extension of one of the receiver housings so that the microphone and boom may be mounted totally within the helmet. The electrical power and control cables are connected to the microphone and the receivers by means of a quick-disconnect type connector and has a separate volume control for the microphone and for the receivers so that two motorcycle riders may adjust the audio system to their liking. The modular arrangement provided by the two connectors permit elements, if broken, to be replaced readily without replacing the entire systems.

Growing community of inventors

Cartersville, GA, United States of America

David Glenn Lashley