| 摘要 |
PURPOSE:To prevent the interference between acoustic waves radiated to the front surface and back surface of a loudspeaker with regard to an indoor acoustic device, by providing acoustic wave dielectrics, directing acoustic waves, on the front surface and back surfaces of the loudspeaker. CONSTITUTION:To fitting edge 8 provided inside of the joint part between front- surface born 5 and back-surface born 6 using metal plates surface-coated so as to prevent resonance, loudspeaker S is fitted with the front surface opposed to floor surface 7. This is covered with wire net 11 and saran net 12 and supported by legs 13 about 30cm away from floor surface 7 to constitute an indoor acoustic device. Consequently, acoustic waves generated at the front surface and back surface of loudspeaker S are reflected on floor surface 7 and the ceiling surface and caught at a sound reception point and both reflected waves never interfer with each other, so that a reproduced sound of fidelity is obtained without lowering the sound pressure level. |
