| 摘要 |
PROBLEM TO BE SOLVED: To provide a speaker device which enables a player to monitor a musical instrument performance without wearing a headphone while not transmitting sound to a person other than the player.SOLUTION: Flat speakers 13 are arranged in a manner to face each other's principle planes which output a sound wave, and sound insulators 23 are arranged on opposite planes to (back planes of) the facing principle planes. Thus, a monitor sound is output only to an area 150 sandwiched by the flat speakers 13. A player in the area 150 can listen to the monitor sound. On the other hand, the sound is hardly output to a place other than the area 150, so that a big-volume performance sound is not transmitted to a person other than the player. |
