All items tagged with patents (75)

Patent Review: Virtual Height Filter for Reflected Sound Rendering Using Upward Firing Drivers

February 17, 2022 by James Croft

Patent Review: Virtual Height Filter for Reflected Sound Rendering Using Upward Firing Drivers

This review discusses a patent that applies to speakers designed for new immersive audio formats in home applications and Dolby Atmos, in particular. Not surprisingly, the patent was awarded to Dolby Laboratories Licensing Corp. As the patent was granted, Voice Coil provided an extensive and informative review - recommended reading for anyone considering entering this important home-theater market segment. This article was originally published in Voice Coil, February 2016.

Outline Awarded Patent for Warped Finite Impulse Response (WFIR) Technology

January 17, 2022 by audioXpress Staff

Outline Awarded Patent for Warped Finite Impulse Response (WFIR) Technology

Following the Italian patent awarded in 2021 to the Outline Newton, an FPGA-based audio processor, the Brescia-based company announced it has now also received a domestic patent for its Warped Finite Impulse Response (WFIR) technology. The Italian manufacturer of professional loudspeaker systems - a pioneer in line-source and adjustable line arrays systems for large scale applications - continues to invest in new loudspeaker-related technologies and has already also applied for an international patent.

Patent Review: Extended Duct with Damping for Improved Speaker Performance

January 11, 2022 by James Croft

Patent Review: Extended Duct with Damping for Improved Speaker Performance

This article reviews a patent granted to Apple, describing an electronic audio device including an enclosure having an acoustic output opening and a speaker positioned within the enclosure, as implemented in the company’s range of iMac desktop computers. The speaker and the acoustic output opening are acoustically coupled by an acoustic output pathway and damping chamber. Apple’s patent cites the Matsushita patent as prior art, but this is a more developed concept. This article was originally published in Voice Coil, December 2015.

Patent Review: Loudspeaker Having a Passive Radiator US9426548B2

January 3, 2022 by James Croft

Patent Review: Loudspeaker Having a Passive Radiator US9426548B2

This article discusses a very interesting design and patent granted in August 2015 to Gary A. Rayner and James C. Larsen, as the inventors, on behalf of Treefrong Developments, from San Diego, CA. The patent abstract details a loudspeaker using one or more active drivers, with a passive radiator connected to each driver and dedicated processors and amplifier per channel - a slightly different approach to a familiar concept. This article was originally published in Voice Coil, November 2015.

Patent Review: Acoustical Window Assembly for Vehicle and Home Theater Solution

December 29, 2021 by James Croft

Patent Review: Acoustical Window Assembly for Vehicle and Home Theater Solution

James Croft reviews two patents for a new type of subwoofer architecture. The first is intended for use in an automobile and the second, for use in a domestic listening room. The first patent relates to an “Acoustical Window Assembly for Vehicle,” while the second describes a home-theater solution using essentially the same concept, adapted to one or more home windows. Both patents were awarded to Magna International, Inc. This article was originally published in Voice Coil, October 2015.

Martin Audio Awarded Patent for XE Monitor Waveguide

December 16, 2021 by audioXpress Staff

Martin Audio Awarded Patent for XE Monitor Waveguide

Martin Audio has extended its list of notable patents with the addition of a United Kingdom Patent for its XE stage monitor waveguide. The patent covers the use of Martin Audio’s differential dispersion coaxial drive units and the continuation of their waveguide shape to form the baffle, as seen in the XE monitors to achieve the desired HF coverage. The geometry of the static HF horn, the LF cone/moving waveguides and the static baffle combine to form a single HF horn.

Dragoslav Colich Receives Innovation Award From Los Angeles & Orange County Audio Society

December 6, 2021 by audioXpress Staff

Dragoslav Colich Receives Innovation Award From Los Angeles & Orange County Audio Society

Audeze Co-Founder and CTO, Dragoslav Colich, has received the 2021 George and Carolyn Counnas Innovation Award from the Los Angeles & Orange County Audio Society for his life’s work and achievements. The award was presented Sunday, December 5, at the Society's annual gala in Los Angeles. Dragoslav Colich was recognized by his extraordinary life’s work with planar magnetic transducers and his overall contributions to the audio industry.

Patent Review: The Zoltan Bay Loudspeaker Patent

November 3, 2021 by James Croft

Patent Review: The Zoltan Bay Loudspeaker Patent

In this article, James Croft reviews a loudspeaker patent granted in 2015 to Zoltan Bay (Tiszaalpar, Hungary). The invention, which is the foundation for the BRS tweeter used in a remarkable series of Bayz Audio loudspeakers, basically describes a horizontally, omnidirectional transducer, using a multiple set of four to eight rolling, half-cylinder film diaphragms arranged in a circle to form a generally omni-directional radiator. This article was originally published in Voice Coil, September 2015.

Patent Review: A New Electro Acoustic Drive System With Sensor from Fraunhofer

October 27, 2021 by James Croft

Patent Review: A New Electro Acoustic Drive System With Sensor from Fraunhofer

In this article, James Croft dives in an interesting loudspeaker patent (US20150146910A1), awarded May 28, 2015 to multiple inventors from the Fraunhofer-Gesellschaft Institute in Munich, Germany. The patent describes a diaphragm drive system with a conventional electromagnetic motor and corrective piezoelectric elements that drive the suspension from a sensor that detects the nonlinearity and provides the corrective signal. This article was originally published in Voice Coil, September 2015.

Dinaburg Speaker with Dual Diffuser - An Innovative Coaxial Driver Design with a Passive Ring Radiator

June 25, 2021 by Mike Klasco

Dinaburg Speaker with Dual Diffuser - An Innovative Coaxial Driver Design with a Passive Ring Radiator

Recently, Dinaburg Technology, based in Dallas, TX, was issued their first US patent for an electro-dynamic loudspeaker with an integrated coaxial passive ring radiator. Mikhail Dinaburg, noted physicist and the patent inventor, uncovered some missing elements in previous coax and passive radiator work and set out to prove it. Dinaburg’s patent discloses techniques for higher performance sound reproduction, enabling lower distortion, extended frequency range, higher efficiency, and improved speech intelligibility. The invention has wide applications and scales from a earphone driver to near-field studio monitors, ceiling speakers, under couch subwoofers to the largest concert subwoofers.

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