ANIMAL REPELLING APPARATUS

PROBLEM TO BE SOLVED: To provide an animal repelling apparatus capable of effectively repelling bats or birds by changing frequency of sonic wave (ultrasonic wave) in a short period. SOLUTION: The animal repelling apparatus 1 includes a sonic wave generation block 1A having a transmitter 2X generating mechanical oscillation by an input electric signal and transmitting sonic wave, a receiver 2Y receiving part of the sonic wave transmitted from the transmitter 2X, generatingmechanical oscillation, and outputting an electric signal, and a feedback circuit 3 amplifying the electric signal transmitted from the receiver 2Y and outputting the amplified electric signal to the transmitter 2X to form a feedback loop passing through the transmitter 2X, the receiver 2Y, and the feedback circuit 3. COPYRIGHT: (C)2011,JPO&INPIT