ALEXANDRIA, Va., March 19 -- United States Patent no. 12,256,189, issued on March 18, was assigned to Harman International Industries Inc. (Stamford, Conn.).
"Loudspeaker arrangement" was invented by Hans Olof Klingberg (Vastra Frolunda, Sweden) and Hans-Juergen Regl (Bogen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A loudspeaker arrangement comprises a transducer arranged in a loudspeaker enclosure, the loudspeaker enclosure enclosing a rear part of the transducer, and an aperture-defining structure (hereinafter, the aperture) 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 within a wide frequ...