US 12,452,599 B2
Loudspeaker assembly for use on the outside of a vehicle
Fabian Vuine, Lebbeke (BE)
Assigned to PSS BELGIUM NV, Dendermonde (BE)
Appl. No. 18/566,866
Filed by PSS BELGIUM NV, Dendermonde (BE)
PCT Filed Jun. 1, 2022, PCT No. PCT/EP2022/064971
§ 371(c)(1), (2) Date Dec. 4, 2023,
PCT Pub. No. WO2022/253924, PCT Pub. Date Dec. 8, 2022.
Claims priority of application No. 2108015 (GB), filed on Jun. 4, 2021.
Prior Publication US 2024/0276151 A1, Aug. 15, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04R 7/18 (2006.01); H04R 7/12 (2006.01)
CPC H04R 7/18 (2013.01) [H04R 7/12 (2013.01); H04R 2307/025 (2013.01); H04R 2307/029 (2013.01); H04R 2307/204 (2013.01); H04R 2307/207 (2013.01); H04R 2499/13 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A loudspeaker assembly for use on the outside of a vehicle, the loudspeaker assembly including:
a loudspeaker, including a drive unit and a diaphragm, wherein the drive unit is configured to move the diaphragm along a movement axis, wherein the diaphragm has a front face that faces in a forwards direction parallel to the movement axis and a rear face that faces in a rearwards direction parallel to the movement axis;
wherein the loudspeaker assembly includes a frame from which the diaphragm is suspended by at least one suspension;
wherein the diaphragm includes a cone-shaped portion which is substantially in the shape of an open cone and has a cone opening angle in the range 90° to 130°;
wherein the at least one suspension includes a surround which is located at the perimeter of the diaphragm, wherein the surround comprises a single corrugation which extends around the perimeter of the diaphragm, wherein the single corrugation is convex with respect to the forward direction, wherein the corrugation has a curved cross section in a section parallel to the movement axis and is tangentially connected to the diaphragm;
wherein the diaphragm and surround are formed of a single piece of material, the material comprising a single layer woven fabric of orthogonal, woven fibers and a thermoset resin and the material having a Young's modulus in the range 2 GPa to 15 GPa as measured in at least one direction; and
wherein the loudspeaker assembly is configured to produce a combined A-weighted sound pressure level in the ⅓rd octave frequency bands 2 kHz, 2.5 kHz, and 3.15 kHz that is no less than 105 dB measured under anechoic conditions at a 2 m distance on the principal axis of the loudspeaker assembly.