US 12,302,079 B2
Speaker unit
Timothy Ruben Scheek, Rotterdam (NL); and Naphur van Apeldoorn, Amsterdam (NL)
Assigned to Mayht Holding B.V., Santa Barbara, CA (US)
Appl. No. 18/040,218
Filed by Mayht Holding B.V., Santa Barbara, CA (US)
PCT Filed Jul. 29, 2021, PCT No. PCT/EP2021/071285
§ 371(c)(1), (2) Date Feb. 1, 2023,
PCT Pub. No. WO2022/029005, PCT Pub. Date Feb. 10, 2022.
Claims priority of application No. PCT/EP2020/071790 (WO), filed on Aug. 3, 2020; and application No. 20205819 (EP), filed on Nov. 5, 2020.
Prior Publication US 2023/0276176 A1, Aug. 31, 2023
Int. Cl. H04R 25/00 (2006.01); H04R 1/28 (2006.01); H04R 9/02 (2006.01); H04R 9/06 (2006.01)
CPC H04R 9/063 (2013.01) [H04R 1/2819 (2013.01); H04R 9/022 (2013.01); H04R 2201/028 (2013.01); H04R 2400/11 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A speaker unit comprising:
a speaker frame;
two membranes arranged in the speaker frame, a first membrane of the membranes having a major acoustic radiation direction substantially perpendicular to a major plane of the speaker unit, and a second membrane of the two membranes having a secondary acoustic radiation direction different from the major acoustic radiation direction;
two drive units positioned within the speaker frame and attached to the first and second membranes, respectively,
wherein the first and second membranes are arranged in opposite configuration in the speaker frame and the secondary acoustic radiation direction is opposite to the major acoustic radiation direction,
wherein the first and second membranes are coaxially aligned along the major and opposite second acoustic radiation direction, and
wherein the two drive units are positioned coaxial to each other at the same height in the speaker frame and laterally displaced from the membranes in a side-by-side arrangement therewith; and
an acoustic duct providing a closed acoustic channel from the second membrane in the secondary acoustic radiation direction to a secondary surface of the speaker unit, the secondary surface being located in a same plane as the major plane of the speaker.