a flushing imitation sound is generated in response to the time of easing nature and a water supply means supplying the flush water tank 3 with water by a signal input from the detecting means. A standby period, when a supply water level to the flush water tank 3 from the water supply piping is kept low and the generation of an imitation sound is prepared, and an imitation-sound operating period, when supply water by the water supply means is discharged from a section upper than the supply water level during the standby period on the basis of the signal input from the detecting means after the standby period, are repeated.
Katsuyoshi, JP 11140938 describes a sound-effects generator by which a sound-effect due to an actual flow of flushingwater can be obtained in a simple device regardless of the existence of a washing water tank such as a low tank. This sound-effects generator is provided with a recovery pipe 7 of which the upper end of the passage is positioned in the inside of a sound-effects chamber 5b which can hold water and of which the upper level is set to be the maximum water storage level in the second-effects chamber 5b, a water supply pipe 6 of which the upper end of the passage is positioned above the upper end of the flow passage of the recovery pipe 7 and of which the delivery direction faces the water storage face side, and a solenoid valve 8 incorporated halfway in the water supply side pipe 6.