Patent Review: Single Enclosure Surround Sound Loudspeaker

James Croft reviews a patent claimed by Polk Audio and granted in 2015, describing “a single-enclosure loudspeaker system that projects multichannel surround sound into a listener’s room, and so replaces multiple conventional surround channel loudspeakers.” The patent also describes, in one embodiment of the invention, that the “surround channel program material is pre-processed by an integrated wireless transmission device that performs certain digital signal processing and channel mixing steps in advance of wireless surround signal broadcast to a receiver.” This article was originally published in Voice Coil, January 2015.

Every month on his Voice Coil's Acoustic Patents column, James Croft (Croft Acoustical) discusses different loudspeaker patents and inventions that are relevant to the audio industry. In the January 2015 edition. Croft reviewed a “Loudspeaker for Eliminating a Frequency Response Dip” patent, granted in November 12, 2014 to Harman International Industries, describing “a speaker system that includes a speaker enclosure having a front end, a rear end, and a first transducer. This article was originally published in Voice Coil, January 2015.