US 12,262,162 B2
Electroacoustic drivers and loudspeakers containing same
Joseph F. Pinkerton, Austin, TX (US); and William Neil Everett, Cedar Park, TX (US)
Assigned to Brane Audio, LLC, Austin, TX (US)
Appl. No. 17/775,497
Filed by Clean Energy Labs, LLC, Austin, TX (US)
PCT Filed Nov. 9, 2020, PCT No. PCT/US2020/059634
§ 371(c)(1), (2) Date May 9, 2022,
PCT Pub. No. WO2021/092540, PCT Pub. Date May 14, 2021.
Claims priority of provisional application 62/962,770, filed on Jan. 17, 2020.
Claims priority of provisional application 62/932,971, filed on Nov. 8, 2019.
Prior Publication US 2022/0394365 A1, Dec. 8, 2022
Int. Cl. H04R 1/02 (2006.01); H04R 1/24 (2006.01); H04R 1/28 (2006.01); H04R 11/02 (2006.01)
CPC H04R 1/025 (2013.01) [H04R 1/24 (2013.01); H04R 1/2803 (2013.01); H04R 11/02 (2013.01)] 29 Claims
OG exemplary drawing
 
1. An electroacoustic loudspeaker comprising:
(a) an electroacoustic driver comprising a bidirectional force electromagnet transducer, wherein
(i) the bidirectional force electromagnet transducer comprises a ferromagnetic disc, a first electromagnet, and a second electromagnet,
(ii) the first electromagnet is operable to pull the ferromagnetic disc in a first direction,
(iii) the second electromagnetic is operable to pull in a second direction, and
(iv) the first direction and the second direction are oppositely directed;
(b) a sealed chamber having a first movable panel, wherein
(i) the first movable panel is bounded by a first expandable boundary material so that the first movable panel can move inward and outward relative to the sealed chamber,
(ii) the electroacoustic driver is operatively connected to the first movable panel for moving the first movable panel inward and outward relative to the sealed chamber, and
(iii) the movement of the first movable panel by the electroacoustic driver is operable for generating sound by the electroacoustic loudspeaker; and
(c) a position sensor to track the position of the ferromagnetic disc, the first movable panel, or both.