US 11,937,066 B2
Active cancellation of a height-channel soundbar array's forward sound radiation
Brad Starobin, Baltimore, MD (US); Scott Orth, Laurel, MD (US); and Stuart W. Lumsden, Baltimore, MD (US)
Assigned to Polk Audio, LLC, Carlsbad, CA (US)
Appl. No. 17/436,932
Filed by Polk Audio, LLC, Owings Mills, MD (US)
PCT Filed Mar. 9, 2020, PCT No. PCT/US2020/021745
§ 371(c)(1), (2) Date Sep. 7, 2021,
PCT Pub. No. WO2020/181288, PCT Pub. Date Sep. 10, 2020.
Claims priority of provisional application 62/815,204, filed on Mar. 7, 2019.
Prior Publication US 2022/0159397 A1, May 19, 2022
Int. Cl. H04S 7/00 (2006.01); H04R 3/12 (2006.01); H04R 5/02 (2006.01); H04R 5/04 (2006.01); H04S 3/00 (2006.01)
CPC H04S 7/301 (2013.01) [H04R 3/12 (2013.01); H04R 5/02 (2013.01); H04R 5/04 (2013.01); H04S 3/008 (2013.01); H04S 7/302 (2013.01); H04R 2201/028 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A multi-channel single enclosure Height-Channel enabled soundbar loudspeaker system, comprising:
an enclosure having a front baffle surface, a top wall surface, a left sidewall, and a right sidewall, the front baffle surface including an upper edge, the front baffle surface terminating along the upper edge with the top wall surface;
a left-main and Height-Channel direct signal cancellation loudspeaker driver mounted at the front baffle surface;
a right-main and Height-Channel direct signal cancellation loudspeaker driver mounted at the front baffle surface;
a left Height-Channel speaker driver or multi-element array aimed upwardly from the top wall surface, positioned proximate to the left sidewall, and having a first acoustic center spaced from the left-main and Height-Channel direct signal cancellation loudspeaker driver by a distance DL-AC in a range of 2 to 8 inches; and
a right ATMOS Height-Channel speaker driver or multi-element array aimed upwardly from the top wall surface, positioned proximate to the right sidewall, and having a second acoustic center spaced from the right-main and Height-Channel direct signal cancellation loudspeaker driver 312R by a distance DR-AC in a range of 2 to 8 inches.