US 11,856,382 B2
Acoustic transducer having drop ring connected at resonant node
Kelvin Francis Griffiths, Porthcawl (GB); and Timothy Erin Sandrik, Missouri, CA (US)
Assigned to Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Appl. No. 17/775,638
Filed by Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
PCT Filed Nov. 18, 2020, PCT No. PCT/US2020/061131
§ 371(c)(1), (2) Date May 10, 2022,
PCT Pub. No. WO2021/102056, PCT Pub. Date May 27, 2021.
Claims priority of provisional application 63/048,240, filed on Jul. 6, 2020.
Claims priority of provisional application 62/937,380, filed on Nov. 19, 2019.
Prior Publication US 2022/0400347 A1, Dec. 15, 2022
Int. Cl. H04R 9/04 (2006.01); H04R 7/04 (2006.01); H04R 31/00 (2006.01)
CPC H04R 9/043 (2013.01) [H04R 7/04 (2013.01); H04R 31/003 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An acoustic transducer comprising:
a housing;
a diaphragm;
a spider; and
a motor that includes a backplate, a frontplate, a magnet, and a voice coil,
a drop ring connecting the diaphragm to the spider at a circumference of the spider, the drop ring extending parallel with respect to a central axis of the housing,
wherein the circumference of the spider is spaced away from the motor, and
wherein the drop ring is connected to the diaphragm at a resonant node of the diaphragm,.
wherein the resonant node of the diaphragm corresponds to a region of minimum movement about which the diaphragm experiences bending.