| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a concert box which is an acoustic device that can reproduce sound similar to concert hall sound composed of direct sound from a player and acoustic echoes from walls, ceilings, and floors with some delay, to the utmost in a small space without depending on electrical control, and can easily obtain acoustic effects as if to be in a concert hall. <P>SOLUTION: A concert box 1 can be installed in a room of a building. Two speakers 14 and 15 composing a stereo unit are installed in the box 1 by facing a listener side as a front of the box 1, two speakers 16 and 17 for generating reflected sound are installed by facing a reflection wall 10 inside of the box 1, and the listener side is set in a direction in which the reflection wall 10 reflects the reflection sound. Further, the front of the box 1 is formed on an opening surface 2, the reflection wall 10 is installed at a back side wall part 3, and two types of materials are arranged on left and right sides, respectively. The speakers 16 and 17 for generating the reflection sound are directed to the two materials, respectively, and a ratio of composite sounds of different materials is changed by adjusting volume of sound in the speakers 16 and 17. <P>COPYRIGHT: (C)2013,JPO&INPIT |
