US 12,256,189 B2
Loudspeaker arrangement
Hans Olof Klingberg, Västra Frölunda (SE); and Hans-Juergen Regl, Bogen (DE)
Assigned to Harman International Industries, Incorporated, Stamford, CT (US)
Filed by Harman International Industries, Incorporated, Stamford, CT (US)
Filed on Jan. 17, 2023, as Appl. No. 18/097,864.
Claims priority of application No. 22154208 (EP), filed on Jan. 31, 2022.
Prior Publication US 2023/0247346 A1, Aug. 3, 2023
Int. Cl. H04R 1/28 (2006.01); B60Q 5/00 (2006.01); B60R 11/02 (2006.01); G10K 11/30 (2006.01); H04R 1/02 (2006.01); H04R 1/30 (2006.01); H04R 3/00 (2006.01); H04R 7/12 (2006.01); B60R 11/00 (2006.01)
CPC H04R 1/2842 (2013.01) [B60Q 5/00 (2013.01); B60R 11/0217 (2013.01); G10K 11/30 (2013.01); H04R 1/025 (2013.01); H04R 1/30 (2013.01); H04R 3/00 (2013.01); H04R 7/12 (2013.01); B60R 2011/004 (2013.01); H04R 2499/13 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A loudspeaker arrangement, comprising:
a transducer arranged in a loudspeaker enclosure, the loudspeaker enclosure encloses a rear part of the transducer;
an aperture-defining structure defines an aperture, the aperture-defining structure is mounted on a front side of the transducer in a direction of propagation of sound emitted by the transducer;
the transducer is configured to emit sound at frequencies within a predetermined wide frequency range;
the aperture defined by the aperture defining structure is configured to amplify sound at predetermined frequencies or within a predetermined frequency range within the predetermined wide frequency range, and to let sound at all other frequencies within the predetermined wide frequency range pass essentially unaltered; and
the loudspeaker enclosure is sized such that a resonance frequency of the loudspeaker enclosure matches a resonance frequency of the transducer in free air, the resonance frequency of the transducer in free air is below a predetermined threshold.