1
Jason D McIntosh: Active noise cancellation aircraft headset system. Telex Communications, Fredrikson & Byron P A, August 21, 2001: US06278786 (110 worldwide citation)

An active noise cancellation aircraft headset system. A speaker is mounted within each earcup of a headset for receiving and acoustically transducing a composite noise cancellation signal. A microphone is also mounted within each earcup for transducing acoustic pressure within the earcup to a corres ...


2
Terrance R Bourk: Noise cancellation headset. Telex Communications, Fredrikson & Byron, January 26, 1993: US05182774 (100 worldwide citation)

A headset for acoustic reproduction of an electronic signal which electronic signal is representative of the summation of a desired audio signal and an anti-noise signal. The headset includes a headband, an earcup mounted to the headband, a driver mounted within the earcup which receives and acousti ...


3
Steven G Christensen: Modular digital audio system having individualized functional modules. Telex Communications, Schwegman Lundberg Woessner and Kluth P A, March 16, 1999: US05883804 (82 worldwide citation)

A system for recording, editing, processing and playing digital audio in a real-time, non-linear, non-destructive fashion. The system comprises a collection of the following modules: a disk controller for reading and writing disk-based media: an I/O processor for moving data between the disk control ...


4
James Hurwitz: Camera mounted wireless audio/video transmitter system. Telex Communications, October 22, 1996: US05568205 (60 worldwide citation)

A video camera/camcorder mounted transmitter for transmitting audio, video, time code and tally status signals through an omnidirectional antenna to a receiver. The receiver demodulates the signal into its original components, and uses the tally status signal to start and stop a recorder associated ...


5
Brian Nelson: Adjustable headset. Telex Communications, Gregory P Kaihoi, January 19, 1999: US05862241 (53 worldwide citation)

A headset which is adjustable to two or more different levels of tightness. The headset includes a headband, and one or two earcups, each such earcup having an inner surface for engagement against the head of a user. At least one of the earcups includes a mounting bracket attaching the earcup to the ...


6
William W Denison: Color graphic imager utilizing a liquid crystal display. Telex Communications, July 31, 1990: US04944578 (50 worldwide citation)

A display including a liquid crystal cell. The cell includes a liquid crystal material, a plurality of electrodes, and first and second polarizers. The first polarizer is located at a viewing side of the cell such that the vibration direction of light polarized thereby is non-parallel to the optic a ...


7
Peter T Salmi, Thomas A Scheller: Compression systems for hearing aids. Telex Communications, Fredrikson & Byron P A, May 11, 1999: US05903655 (38 worldwide citation)

A hearing aid circuit using an averaging detector and a plurality of time constants to produce a compression control signal to control the gain of a compression amplifier which compresses an input signal when the averaging detector signal exceeds a predetermined threshold. The compression control si ...


8
David A Hotvet: Automatic gain control for hearing aid. Telex Communications, Sturm & Baker, January 5, 1988: US04718099 (36 worldwide citation)

A hearing aid having signal compression characteristics that adapt to the environment of the sound field in which it is operative in which an automatic gain control signal processor is responsive to the magnitude, duration and frequency of the signals in a sound field to control a compression amplif ...


9
Christopher D Wiegel: Earcup suspension for headphone. Telex Communications, Warren A Sturm, May 24, 1988: US04747145 (35 worldwide citation)

An earcup suspension for a headphone includes a housing, having a vertically oriented slot and stationarily mounted on the lower end of a headband to be disposed over the top of the headphone user, an earcup mounting includes a vertical member slidably extending through the slot in the housing and h ...


10
Steven G Christensen: TDM digital matrix intercom system. Telex Communications, Gregory P Kaihoi, January 9, 1996: US05483528 (32 worldwide citation)

A time division multiplexing ("TDM") digital matrix intercom system for connecting intercom stations. The system includes a digital switching system receiving audio input communications signals from at least some of the intercom stations, and sending audio input communications signals to at least so ...