| 摘要 |
PROBLEM TO BE SOLVED: To realize lowering of noise in an amusement center by disposing a speaker generating sound waves in an audible area in an area where a player is positioned in the case of using the game machine at the game machine or its surrounding, so as to make each player using a game machine hear different sounds. SOLUTION: A game controlling part 36 inside a game machine 35 is electrically connected with a display screen 37, a game controller 38, a sound generating means 25 and a speaker 20. The speaker 20 to be used is a parametric speaker and sound wave of strong directivity is generated toward the head of the player D from the speaker 20 to allow the player D to catch only sound related with a game machine he uses. By using the parametric speaker 20 like this manner, the sound wave generated here advances straight nearly without spreading in the direction of a plane orthogonal with the advancing direction of the sound wave, thereby a player of an adjacent game machine cannot catch the sound and noise in the amusement center is reduced.
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