Polk Audio, LLC

Dei Headquarters, Inc.

Scott Orth

Stuart W Lumsden

Allen S Baron

Brad Starobin

Ken S Chae

Nicholas A Mondich

Ken Sakamaki Chae

Steven S Tourison

Lowell J Smith

David A Fitzpatrick

Jens-Peter B Axelsson

David Fitzpatrick

A multi-driver multi-channel single enclosure Height-Channel (e.g., ATMOS™ or DTS-X®) enabled soundbar loudspeaker systemuses a novel signal processing system, driver mounting configuration (L,R) and method to provide a high fidelity home theater listening experience, in a manner which relies on a new method for cancellation of unwanted direct (not ceiling-bounced) radiation of the Height-Channel (or virtual height envelopment) channel's soundDS.

Active cancellation of a height-channel soundbar array's forward sound radiation

A loudspeaker system () includes an overhead sound image generating (e.g., ATMOS™) elevation sound projecting loudspeaker transducer or array () for reproducing an elevation signal and a second cancellation loudspeaker or transducer array () for generating and projecting a direct signal cancellation. The cancellation speaker or array () is driven with a filtered, polarity reversed version of the elevation signal to cancel undesired direct sound () from elevation speaker () which would otherwise diminish the quality of elevation signal reproduction for a listener L.

Loudspeaker system with overhead sound image generating (e.g., ATMOS™) elevation module and method and apparatus for direct signal cancellation

A loudspeaker system (or) and method for tuning ported loudspeakers and reducing unwanted acoustic resonances provides reduced port noise, eliminates undesired port resonances and improves the accuracy and fidelity of reproduced sound in a loudspeaker system of relatively high efficiency with an enclosure including an Eigen Tone Filter structure ('ETF') comprising a pipe or set of pipesplaced inside a loudspeaker vent to absorb the “open pipe” acoustic resonance of the vent. The open-pipe resonance is unwanted and interferes with the midrange performance of the loudspeaker, when in use, if not corrected.

Loudspeaker system, method and apparatus for absorbing loudspeaker acoustic resonances

A multi-driver multi-channel single enclosure Height-Channel (e.g., ATMOS® or DTS-X®) enabled soundbar loudspeaker systemuses a novel signal processing system, driver mounting configuration (L,R) and method to provide a high fidelity home theater listening experience, in a manner which relies on a new method for cancellation of unwanted direct (not ceiling-bounced) radiation of the Height-Channel (or virtual height envelopment) channel's soundDS.

An enhanced Stereo Dimensional Array loudspeaker systempreferably including a mirror image pair of loudspeaker enclosuresL,R configurable by a user or installer as a left-channel loudspeaker and a right channel loudspeaker each having a driver array aiming configuration with first and second angled baffle facets carrying main and effects drivers on separate facets and a Head Shadow filter signal processing system and method for driving the main and effects drivers to achieve a psycho-acoustically expanded image breadth by Head Shadow filter compensated inter-aural crosstalk cancellation.

Head related transfer function equalization and transducer aiming of stereo dimensional array (SDA) loudspeakers

A canal phone incorporates a transducer within an isolation sound chamber for reproducing sound from an audio source, and a sound-transmission passageway, or ambient sound port, for allowing ambient sounds to enter the isolation sound chamber. The passageway has inner and outer apertures, one oriented towards the ambient noise environment outside of the listener's ear and the other oriented toward the isolated chamber formed by the space between a loudspeaker diaphragm within the canal phone and the tympanum of the listener's ear. The canal phone has a port blocking switch mechanism that selectively opens or closes the aperture of the passageway that is open to the ambient noise. This switch mechanism may also electrically disconnect the transducer and seal either the outer or the inner end of the passageway in different embodiments of the invention.

Canal phones with structure and method for selectively passing or blocking environmental ambient sound and switchable electrical connections

A ceiling-mounted loudspeaker includes a horn-shaped enclosure, an acoustic driver, and a front module. The tubular or horn-shaped enclosure carries a slanted woofer or loudspeaker driver which radiates into an angled or slanted first opening. The tubular enclosure terminates at bottom in a second, circular opening substantially parallel to a second plane, wherein the woofer's slanted plane is inclined with respect to the second plane. The slanted woofer can be oval and radiates sound through the enclosure's interior lumen and outwardly through ports defined in a substantially circular baffle carrying the front module and connected to the second opening. The baffle carries a midrange and tweeter near the ceiling where they can provide enhanced sound dispersion.

Growing community of inventors

Baltimore, MD, United States of America

Scott Orth