All items tagged with patents (78)

The Latest in Loudspeaker Knowledge and Developments in Voice Coil October 2023

September 29, 2023 by audioXpress Staff

The Latest in Loudspeaker Knowledge and Developments in Voice Coil October 2023

In the October 2023 issue of Voice Coil, James Croft reviews an active noise control enclosure system, and Mike Klasco and Nora Wong provide an updated directory of Integrated Electronics for Loudspeakers. Vance Dickason offers three different driver characterizations, starting with the AMT100H driver from Eighteen Sound. Next up, he tests an updated version of the popular TW030WA23/24 tweeter from Wavecor. And finally, measures the Scan-Speak D2008/2010, the revised version of the classic dome tweeter from the Danish brand.

Lenbrook Acquires MQA, Patents, and Audio Codecs

September 19, 2023 by Joao Martins

Lenbrook Acquires MQA, Patents, and Audio Codecs

Lenbrook Corp., the privately-owned Canadian audio company that owns NAD Electronics, PSB Speakers, Bluesound, Bluesound Professional, and BluOS, has acquired the assets of UK-based company MQA. The deal adds significant audio patents and codecs to Lenbrook’s IP portfolio, including MQA's high-resolution audio encoding and the latest SCL6 Scalable Codec for wireless audio applications, which is implemented in the upcoming line of PSB headphones and earbuds.

Patent Review: Two Pioneer Patents. Same Speaker Invention

July 20, 2023 by James Croft

Patent Review: Two Pioneer Patents. Same Speaker Invention

This article reviews two patents titled simply "Speaker Device" from four Japanese inventors, on behalf of Pioneer Corp. of Japan. The original and expanded patent describes a flat speaker device capable of emitting loud reproduced sound, using a mechanical structure that converts a linear voice coil motion in one axis to an orthogonal mechanical diaphragm displacement. The system functions much like a scissor-jack you would use to raise your automobile to change a tire. The linear motion of the threaded rod coverts the axial force to a 90° lift movement.

Electrostatic Loudspeakers and Two Cutting-Edge High-End Tweeters in Voice Coil June 2023

May 31, 2023 by audioXpress Staff

Electrostatic Loudspeakers and Two Cutting-Edge High-End Tweeters in Voice Coil June 2023

Voice Coil June 2023 features an extensive patent review in James Croft's Acoustic Patents column. The topic is a 2014 patent awarded to Nokia, offering an opportunity to revisit the history of electrostatic loudspeakers, with insights from Tim Mellow, one of the two listed inventors. In Test Bench, Vance Dickason focuses on the D8404-552000 Ellipticor cloth diaphragm dome midrange from Scan-Speak, and characterizes the SB Acoustics TW29BNWG beryllium dome and waveguide from the brand's prestigious Satori line.

Patent Review: Simply A Speaker by Harman

May 25, 2023 by James Croft

Patent Review: Simply A Speaker by Harman

This review looks at a speaker patent, awarded to inventor Shengbo Li from Guangdong, China, on behalf of Harman International. The abstract from that patent details a speaker including one or multiple transducers, an enclosure, and a suspension mounted on the enclosure, wherein the suspension and the enclosure are configured such that the enclosure is capable of vibrating as a result of operation of the transducer so as to produce audible sound. You read it right, the enclosure is also a passive radiator!

Patent Review: Rotary Transducer with Improved High-Frequency Output

April 26, 2023 by James Croft

Patent Review: Rotary Transducer with Improved High-Frequency Output

This article examines an important patent filed in 2014 by F. Bruce Thigpen (Tallahassee, FL) and granted in June 2016. Appearing both as the inventor and assignee, Thigpen describes a rotary sound transducer having an improved output at higher frequencies. Thigpen has been working on this type of device for more than a decade and has advanced what was already a very difficult engineering achievement, to a more sophisticated structure that apparently raises the general performance and high frequency limits beyond what was thought possible with this architecture. This article was originally published in Voice Coil, July 2017.

Get Connected to Speaker Intelligence in Voice Coil April 2023

March 29, 2023 by audioXpress Staff

Get Connected to Speaker Intelligence in Voice Coil April 2023

The April 2023 issue of Voice Coil reveals the genesis of Echo Test + Measurement and its AIO Test System. As scheduled, there's an updated industry directory of Cable and Connector vendors, James Croft reviews a key Polk Audio patent that expands on its Polk SDA loudspeaker prior art now in a more compact enclosure. And on Test Bench, Vance Dickason focus on the characterization of the innovative TW045WA01 dual-diaphragm tweeter from Wavecor.

AntennaWare Awarded European Patent for Innovative Multi-Mode Antenna

March 23, 2023 by audioXpress Staff

AntennaWare Awarded European Patent for Innovative Multi-Mode Antenna

AntennaWare Ltd, specialists in solving body-blocking problems normally associated with close-range RF designs, has been awarded a European Patent which is expected to have important implications for enabling implantable devices within the human body. The new multi-mode antenna from AntennaWare enables reliable and continuous communications even in next-generation medical applications or from sensors inside obstructed structures.

Speaker Enclosures and Cabinets in Voice Coil March 2023

February 28, 2023 by audioXpress Staff

Speaker Enclosures and Cabinets in Voice Coil March 2023

In this issue of Voice Coil, Mike Klasco shares his experience dealing with sustainability and other noble goals, an article that was greatly inspired by the effort to compile another updated Speaker Enclosure Vendor Directory for 2023. In Acoustic Patents, James Croft explains how Yamaha recently invented a clever way to use a Class-D amplifier to bend the infamous "Hofmann’s Iron Law." And Vance Dickason takes the new 10HX230 10" coaxial professional driver from Faital Pro to his Test Bench.

Beyma Introduces Innovative Solutions for Next-Generation Compression Drivers

February 6, 2023 by Joao Martins

Beyma Introduces Innovative Solutions for Next-Generation Compression Drivers

The brand new generation of Beyma compression drivers originates from an intense R&D effort and two patent-pending innovations. Unveiled at ISE 2013, Beyma's four base designs with 2 throat sizes, 4 voice coil diameters, 3 diaphragm materials and 2 magnet types, allow for a total of 12 new models (for now). Scheduled to be launched progressively during 2023, these new Beyma state-of-the-art high frequency transducers deliver new exciting possibilities for speaker designs.

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