Method of improving the quality of sound reproduction and apparatus for carrying at least one loudspeaker emitting in three directions

摘要

PCT No. PCT/FR91/00803 Sec. 371 Date May 24, 1993 Sec. 102(e) Date May 24, 1993 PCT Filed Oct. 16, 1991 PCT Pub. No. WO92/07448 PCT Pub. Date Apr. 30, 1992.A sound reproducing apparatus includes a tube which is open at both ends, and an open-sided cavity which is adjacent to the tube. A membrane seal is provided between the cavity and the tube. An electro-acoustic transducer, disposed half in the tube and half in the cavity, divides the tube into forward and rear emission areas which are sealed from each other. In the cavity, the transducer defines a lateral emission area which extends laterally with respect to the transducer axis and is in quadrature with the forward and rear emission areas. In another embodiment the tube is nonlinear and there are two transducers which are located respectively in the tube and in the cavity. The method utilizes two transducers with parallel axes. The first transducer emits sound forwardly and rearwardly into sealed apart first and second emission areas. The second transducer emits sound in a direction which is lateral with respect to the transducer axes, into a third emission area which is sealed from the first and second emission areas.