US 12,256,207 B2
Electroacoustic drivers and loudspeakers containing same
Joseph F. Pinkerton, Austin, TX (US); David A. Badger, Lago Vista, TX (US); James A. Andrews, Austin, TX (US); William Martin Lackowski, Austin, TX (US); and William Neil Everett, Cedar Park, TX (US)
Assigned to Brane Audio, LLC, Austin, TX (US)
Appl. No. 17/794,567
Filed by Clean Energy Labs, LLC, Austin, TX (US)
PCT Filed Sep. 18, 2020, PCT No. PCT/US2020/051633
§ 371(c)(1), (2) Date Jul. 21, 2022,
PCT Pub. No. WO2021/150278, PCT Pub. Date Jul. 29, 2021.
Claims priority of provisional application 63/048,393, filed on Jul. 6, 2020.
Claims priority of provisional application 63/022,125, filed on May 8, 2020.
Claims priority of provisional application 62/963,833, filed on Jan. 21, 2020.
Prior Publication US 2023/0345180 A1, Oct. 26, 2023
Int. Cl. H04R 9/06 (2006.01); H04R 1/02 (2006.01); H04R 1/28 (2006.01); H04R 3/00 (2006.01); H04R 9/02 (2006.01); H04R 9/04 (2006.01); H04R 11/02 (2006.01); H04R 17/00 (2006.01); H04R 29/00 (2006.01)
CPC H04R 9/06 (2013.01) [H04R 1/025 (2013.01); H04R 1/2803 (2013.01); H04R 3/00 (2013.01); H04R 9/025 (2013.01); H04R 9/041 (2013.01); H04R 9/046 (2013.01); H04R 11/02 (2013.01); H04R 17/00 (2013.01); H04R 29/001 (2013.01); H04R 29/003 (2013.01); H04R 2400/07 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A loudspeaker comprising:
(a) a sealed enclosure;
(b) a sound panel mechanically connected to the sealed enclosure;
(c) an actuator operable to convert electrical energy into mechanical energy; and
(d) a magnetic negative spring (MNS), wherein
(i) the MNS comprises a stationary magnet and a movable armature,
(ii) the movable armature comprises a ferromagnetic element,
(iii) the movable armature is mechanically connected to the sound panel and to the actuator, and
(iv) the MNS is operable to create a magnetic force that at least partially cancels a mechanical force on the sound panel due to a pressure change within the sealed enclosure.