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Thomas R Horrall, Parker W Hirtle: Partition system for open plan office spaces. Bolt Beranek and Newman, Kenway & Jenney, October 9, 1984: US04476572 (26 worldwide citation)

The partition system disclosed herein incorporates apparatus for generating a speech masking acoustic field. Respective speakers are mounted near the bottom of each of a plurality of partition panel segments defining each work space and are aimed horizontally. These speakers are driven by respective ...


2
Thomas R Horrall: Personal sound masking system. Acentech, Weingarten Schurgin Gagnebin & Hayes, February 13, 2001: US06188771 (24 worldwide citation)

A personal sound masking system for use in an individual workspace provides an optimized acoustic background environment by delivering a sound masking signal that is specifically matched to the individual user's location and physical relationship to other nearby offices. The sound masking syste ...


3
Thomas R Horrall, John C Heine: Sound masking system. Acentech, Weingarten Schurgin Gagnebin & Lebovici, March 20, 2007: US07194094 (18 worldwide citation)

A sound masking system according to the invention is disclosed in which one or more sound masking loudspeaker assemblies are coupled to one or more electronic sound masking signal generators. The loudspeaker assemblies in the system of the invention have a low directivity index and preferably emit a ...


4
Bill G Watters, Michael Nacey, Thomas R Horrall: Process and apparatus for speech privacy improvement through incoherent masking noise sound generation in open-plan office spaces and the like. Bolt Beranek and Newman, Rines and Rines Shapiro and Shapiro, November 22, 1977: US04059726 (17 worldwide citation)

The invention involves the use of a plurality of incoherent noise generators distributed, in one embodiment, along ceilings in open-plan and partitioned office spaces and the like, to diffuse masking sound energy through acoustical tile and other false ceiling structures while tailoring the same for ...


5
Thomas R Horrall: Personal sound masking system. Acentech, Weingarten Schurgin Gagnebin & Lebovici, May 3, 2005: US06888945 (15 worldwide citation)

A sound masking system for a multi-occupant work area includes a masking signal generator generating incoherent masking sound signals loudspeaker modules interconnected in a daisy-chain fashion, with each loudspeaker module receiving the masking sound signals on input connections and transmitting th ...


6
Thomas R Horrall, Richard A Greiner: Multichannel masking sound generator. Bolt Beranek and Newman, Pahl Lorusso & Loud, June 16, 1987: US04674124 (11 worldwide citation)

In the masking sound source disclosed herein, easily adjustable but matching acoustic energy spectrums are obtained from different channels by providing, for each channel, a plurality of bandpass filters, each of which is provided with a respective gain-controlled amplifier for selectively adjusting ...


7
Thomas R Horrall, John C Heine: Sound masking system. Cambridge Sound Management, Hamilton Brook Smith & Reynolds P C, July 7, 2015: US09076430 (4 worldwide citation)

A sound masking system according to the invention is disclosed in which one or more sound masking loudspeaker assemblies are coupled to one or more electronic sound masking signal generators. The loudspeaker assemblies in the system of the invention have a low directivity index and preferably emit a ...


8
Christopher Calisi, Gordon V Cook, Edward Driscoll, Thomas R Horrall: Wireless sound-emitting device and system for remotely controlling a sound-emitting device. Nightingale Smart Solutions, Hamilton Brook Smith & Reynolds P C, March 14, 2017: US09596539 (1 worldwide citation)

A wireless sound-emitting device includes a housing adapted to be coupled to a wall at a source of electric power, a loudspeaker positioned at a periphery of the housing, a control module outputting an electric audio signal to the at least one loudspeaker, and a wireless communications module in ele ...


9
Thomas R Horrall, John C Heine: Sound masking system. Cambridge Sound Management, Hamilton Brook Smith & Reynolds P C, November 14, 2017: US09820040

A sound masking system according to the invention is disclosed in which one or more sound masking loudspeaker assemblies are coupled to one or more electronic sound masking signal generators. The loudspeaker assemblies in the system of the invention have a low directivity index and preferably emit a ...


10