| 摘要 |
PROBLEM TO BE SOLVED: To prevent persons near a game machine from suffering a trouble, since a player leaves the game machine during a BB game and a large game sound is continuously emitted even when the game is not carried out in the game machine. SOLUTION: It is decided whether or not 30 seconds or more elapse from the start timing of a previous game (step 172). When 30 seconds or more do not elapse, the sound volume of the game sound is maximized (step 173). Then, it is decided whether or not 60 seconds or more elapse from the start timing of the previous game (step 174). When 60 seconds or more do not elapse, the sound volume of the game sound is lowered by one step to emit the sound (step 175). Then, it is decided whether or not 90 seconds or more elapse from the start timing of the previous game (step 176). When 90 seconds or more do not elapse, the sound volume of the game sound is further lowered by one step to emit sound (step 177). When 90 seconds or more elapse, the game sound is eliminated. (step 178).
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