Patent Review: Dual Coil Electrodynamic Transducer with Channels for Voice Coil Cooling

James Croft reviews a published design submitted on behalf of Harman International Industries on January 2017. The design details an important approach to solving the everlasting problems of heat generation that limits the power handling capacity and the distortion-free acoustic output capability of loudspeakers, as well as their efficiency as electroacoustical transducers. This article was originally published in Voice Coil, September 2018.​​​​​​​

Resonado, the technology startup that is now ready to bring to market its patented Flat Core Speaker (FCS) technology introduced at CES 2020, announced that Catharina Lavers Mallet has joined the Resonado board of advisors. Mallet, a former Bose Corporation executive with significant experience in both startup and large corporate environments, will work with Resonado’s executive team to hone strategic direction and mature their operating model as the company expands its licensing efforts.

Leading French speaker and headphone manufacturer, Focal unveiled the company’s newest line of mobile headphones, including its premium closed-back wireless over-ear Listen Wireless, In-ear Spark and Spark Wireless, and Hi-fi in-ear Sphear S models. The new headphones and in-ear products combine latest technology and design, targeting the bourgeoning mobile lifestyle market.

Claudio Lastrucci, co-founder of Powersoft S.p.A. and current R&D Director, is presenting a tutorial titled, “A New High Performance Moving Magnet Acoustic Transducer” at the premier event for the loudspeaker and acoustics industry, ALMA’s Winter Symposium on January 3rd & 4th, at the Tuscany Suites and Casino in Las Vegas.