US 12,464,293 B2
Speaker unit with a speaker frame and two opposing sound producing membranes
Timothy Ruben Scheek, Rotterdam (NL); and Mattias Jeffrey Scheek, Amsterdam (NL)
Assigned to Mayht Holding B.V., Goleta, CA (US)
Filed by Mayht Holding B.V., Santa Barbara, CA (US)
Filed on Apr. 28, 2023, as Appl. No. 18/309,393.
Application 18/309,393 is a continuation of application No. PCT/EP2021/080612, filed on Nov. 4, 2021.
Application PCT/EP2021/080612 is a continuation of application No. 17/088,624, filed on Nov. 4, 2020, granted, now 11,166,107, issued on Nov. 2, 2021.
Prior Publication US 2023/0379633 A1, Nov. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04R 9/06 (2006.01); H04R 9/04 (2006.01)
CPC H04R 9/063 (2013.01) [H04R 9/043 (2013.01); H04R 2400/07 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A speaker unit comprising:
a speaker frame with a major front surface and a major back surface,
a first membrane coupled to the major front surface and an opposing second membrane coupled to the major back surface, the first and second membranes configured to move inward and outward along an excursion axis;
a first drive unit coupled to the first membrane, the first drive unit comprising a first driver static part and a first driver moving part coupled to the first membrane;
a second drive unit coupled to the second membrane, the second drive unit comprising a second driver static part and a second driver moving part coupled to the second membrane;
a first sealing edge suspension coupling the first membrane to the front major surface, the first sealing edge suspension comprising:
a radially inner end coupled to a perimeter of the first membrane;
a radially outer end coupled to the major front surface; and
an arc shaped portion between the radially inner end and the radially outer end, wherein an apex of the arc shaped portion is positioned on an apex radius (ra) from the excursion axis, a radially inner surface of the first drive unit is positioned on a magnet radius (rm) from the main speaker axis (A), the apex radius (ra) being larger than the magnet radius (rm),
wherein the first sealing edge suspension is configured such that the are shaped portion bends over the er surface of the first drive unit when the first membrane moves inward along the excursion axis; and
a second sealing edge suspension coupling the second membrane to the back major surface.