1
Juha Kuusama: Sound reproduction system. Nokia Technology, Ware Fressola Van Der Sluys & Adolphson, April 16, 1996: US05509081 (30 worldwide citation)

The invention relates to a sound reproduction system comprising a source of a sound signal in electrical form, a first filter group for dividing the signal derived from the sound signal source into several sound signals occurring in different frequency bands and an adjustable gain amplifier for each ...


2
Juha Kuusama, Minna Juhola, Juha Laaksonen: Bass management system for home theater equipment. Flextronics Design Finland Oy, Burns Doane Swecker & Mathis L, December 18, 2001: US06332026 (30 worldwide citation)

A setup to be used in a home theater or sound reproduction system for handling low frequency sound signals with a signal source providing several full bandwidth digital sound channels and at least one digital low frequency subwoofer channel includes a delay-and level control unit at least for each f ...


3
Juha Kuusama, Aki Makivirta: Device to be used for changing the acoustic properties of a room. Nokia Technology, Ware Fressola van Der Sluys & Adolphson, September 24, 1996: US05559891 (19 worldwide citation)

The invention relates to a device to be used for changing the acoustic properties of a room, comprising a pressure transducer (1), a loudspeaker (2) and an electronic control circuit (3) adapted to generate, in response to pressure changes in the room, an electrical signal that serves to cancel the ...


4
Juha Kuusama, Aki Makivirta: System for processing an audio signal so as to reduce the noise contained therein by monitoring the audio signal content within a plurality of frequency bands. Nokia Technology, Ware Fressola Van Der Sluys & Adolphson, January 16, 1996: US05485524 (15 worldwide citation)

The invention relates to a system for processing an audio signal to reduce the noise contained therein, the system comprising a source (1) of an audio signal in electric form, a first filter group (2) for dividing the audio signal into several subband signals in different frequency bands, a detector ...


5
Juha Kuusama: Active noise cancellation system. Nokia Technology, Ware Fressola Van der Sluys & Adolphson, August 8, 1995: US05440641 (8 worldwide citation)

An active noise cancellation system, comprising a circuit for generating one or more reference signals (x(n)) proportional to the noise in the target area, several electronic circuits (1) having adjustable transfer functions (W), such as adaptive filters, adapted to receive the one or more reference ...



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