All items tagged with James Croft (79)

Patent Review: System and Method for Improved Audio Perception

October 19, 2022 by James Croft

Patent Review: System and Method for Improved Audio Perception

Sometimes James Croft reviews patents that are hard to understand how could they possibly have materialized. This patent describes a “System and Method for Improved Audio Perception” and was granted to Yair Raz (inventor) on behalf of Innovo IP, LLC (Aventura, FL). The “invention” describes “methods of Audio Signal Personalized Enhancement for optimal listening to music using a combination of hearing test, audio signal compensation, and signal processing algorithms. A description that could easily be applied to dozens of currently available products. This article was originally published in Voice Coil, November 2016.

Key Loudspeaker Updates for the Industry in Voice Coil October 2022

September 28, 2022 by audioXpress Staff

Key Loudspeaker Updates for the Industry in Voice Coil October 2022

In this edition of Voice Coil, Mike Klasco writes about Dr. Kurt Müller's 100-Year Anniversary, Mike Klasco and Nora Wong compiled an updated Integrated Electronics for Loudspeakers directory, and James Croft reviews an intriguing patent of a Vertically and Horizontally Balanced Subwoofer. For this issue's Test Bench, Vance Dickason focused his full attention on another innovative driver from Purifi Audio, this time the PTT5.25X04-NFA-01 5.25” Midbass Woofer.

Unique Speakers, Parts, and Concepts in Voice Coil September 2022

August 30, 2022 by audioXpress Staff

Unique Speakers, Parts, and Concepts in Voice Coil September 2022

Voice Coil September 2022 offers an article about solutions for Smart Speakers and Voice Processing by Mike Klasco, and an updated directory of Magnet Vendors and Distributors for 2022. James Croft reviews a recent patent awarded to Tymphany for a new Coaxial Loudspeaker design, and Vance Dickason characterizes two very original drivers in Test Bench. The HF1460 compression driver from Faital Pro and the Tang band the W4-2356 4" full-range woofer with an off-centered voice coil.

Patent Review: A Different Concept Loudspeaker

August 18, 2022 by James Croft

Patent Review: A Different Concept Loudspeaker

In this article, James Croft reviews a generic “Loudspeaker” concept patent, granted to Teppei Yamada, of Tokyo, Japan, on behalf of Zorzo Co., Ltd. and which describes a somewhat surprising concept of a loudspeaker that includes a hermetically sealed enclosure, with a driver outside of an enclosure and a second driver inside, with a pipe communicating between the two drivers. The second driver is configured to output a signal of opposite phase to that of the first driver. This article was originally published in Voice Coil, October 2016.

Patent Review: Inverse Horn Loudspeakers

August 4, 2022 by James Croft

Patent Review: Inverse Horn Loudspeakers

This article reviews a patent originally granted to inventors Philip R. Clements; (Tempe, AZ), Boaz Shalev; (Needham, MA), and James Joseph Croft, III; (Bellevue, WA), which has now expired. The patent describes a low-frequency transducer system with a multi-compression chamber, where an inverse horn structure is employed in combination with a resonance-distortion filter chamber. This was the third patent granted on Atlantic Technology’s low frequency system known by the trademark name H-PAS (High Pressure Acceleration System). This article was originally published in Voice Coil, September 2016.

Loudspeaker Manufacturing, Patents, and Driver Characterizations in Voice Coil August 2022

July 27, 2022 by audioXpress Staff

Loudspeaker Manufacturing, Patents, and Driver Characterizations in Voice Coil August 2022

August is traditionally the voice-coil-focused issue of Voice Coil, offering an always-valuable perspective on the state of the loudspeaker industry. In this issue, Mike Klasco discusses Audio Manufacturing in The Philippines, James Croft explores another key Mayht patent, and Vance Dickason measures and characterizes the B&C Speakers DE111-8 1" compression driver, and the MD60N-6 2.5” Dome Midrange from SB Acoustics' Satori line.

Patent Review: An Orthogonal Ergonomic Speaker

July 6, 2022 by James Croft

Patent Review: An Orthogonal Ergonomic Speaker

This review looks at an independently patent submitted in 2013 and awarded in 2016 to Jack Nilsson (Canton, OH), describing a system and method for an audio system including a first speaker that reproduces sounds in a first frequency range and a second speaker that reproduces sounds in second frequency range. As James Croft comments, the patent is interesting in its purposeful application of breaking currently established rules and may be useful in certain applications or environments. This article was originally published in Voice Coil, August 2016.

Patent Review: Improved Speaker Structure by Jazz Hipster

June 28, 2022 by James Croft

Patent Review: Improved Speaker Structure by Jazz Hipster

This article reviews a patent application submitted in 2010 by to two inventors, on behalf of Jazz Hipster Corp. (Taiwan), regarding an improved structure of a speaker using the surround to reduce the resistance of the diaphragm excursion, which helps to generate a more linear diaphragm movement, with less resistance, and reduced distortion. As James Croft noted, the approach had been used in the past, but its use decreased due to the high-performance achieved with well-designed roll-surrounds, at a lower cost. No surprisingly this patent was subsequently abandoned.

Headphone Testing and Lots of Speaker Knowledge in Voice Coil June 2022

May 27, 2022 by audioXpress Staff

Headphone Testing and Lots of Speaker Knowledge in Voice Coil June 2022

Another great issue of Voice Coil magazine. Vance Dickason writes about the Multi-Tone Measurement Module (MTON) available for the Klippel KA3 Analyzer. Mike Klasco and Nora Wong (Menlo Scientific) compiled an updated Directory of Headphone Test & Measurement Equipment for 2022. We revisit a 2004 patent of a speaker using an "Internal Negative Stiffness Mechanism." And in Test Bench, Vance Dickason characterizes the latest Celestion CDX1-1412 1" Compression Driver and a new 3" dome midrange from Tang Band Speaker (TB Speaker).

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.

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