US 12,335,714 B2
Automotive audio system transducer
George Digby Fryer, West (GB); Matthew Lyons, York, PA (US); and Bradley M. Starobin, Baltimore, MD (US)
Assigned to Sound United, LLC, Carlsbad, CA (US)
Filed by Sound United, LLC, Carlsbad, CA (US)
Filed on Oct. 31, 2023, as Appl. No. 18/498,573.
Application 18/498,573 is a division of application No. 17/526,569, filed on Nov. 15, 2021, granted, now 11,838,740.
Claims priority of provisional application 63/113,572, filed on Nov. 13, 2020.
Prior Publication US 2024/0147175 A1, May 2, 2024
Int. Cl. H04R 7/00 (2006.01); H04R 1/02 (2006.01); H04R 1/34 (2006.01); H04R 5/02 (2006.01); H04R 5/04 (2006.01); H04S 1/00 (2006.01); H04S 7/00 (2006.01)
CPC H04S 7/30 (2013.01) [H04R 1/023 (2013.01); H04R 1/025 (2013.01); H04R 1/345 (2013.01); H04R 5/02 (2013.01); H04R 5/04 (2013.01); H04S 1/007 (2013.01); H04R 2430/00 (2013.01); H04R 2430/01 (2013.01); H04R 2499/13 (2013.01); H04S 2400/13 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An automotive audio system electrodynamic acoustic transducer, comprising:
a pole piece having a first end terminating distally in a distal end surface;
a voice coil comprising wire windings configured to receive electrical current, the voice coil being configured to move along the first end of the pole piece;
a magnetic structure comprising parts defining an air gap in which the voice coil is disposed, the magnetic structure being configured to create a magnetic field in which the voice coil is configured to move along the first end of the pole piece;
a diaphragm comprising a central portion with an inner periphery and an outer periphery, the inner periphery of said diaphragm defining a central opening and being attached to the voice coil to move with the voice coil;
a floating or suspended bulbous waveguide member spaced from and suspended before the distal end surface of the pole piece, the waveguide member having a circumference that projects radially to a larger diameter than the pole piece to project laterally over an inner radiating area of the diaphragm;
an acoustically transparent mesh or grill structure that supports the waveguide member in an orientation which is centered along a central aiming or excursion axis of the automotive audio system electrodynamic acoustic transducer;
wherein the waveguide member has a proximal smaller diameter circular surface separated by a waveguide member axial thickness from a distal smaller diameter circular surface, with a central larger diameter central segment defining a larger diameter peripheral edge that is integrally molded with or mounted to the acoustically transparent mesh or grill structure;
wherein the waveguide member is suspended apart from the distal end surface of the pole piece to provide a gap or cavity defined by a volume of air in front of the distal end surface of the pole piece;
wherein the distal end surface of the pole piece is covered or occluded; and
wherein the automotive audio system transducer is configured such that, in operation, a substantial portion of sound within the gap or cavity is absorbed and attenuated to reduce destructive interference.