| 摘要 |
PROBLEM TO BE SOLVED: To provide an animal-repelling sound generation device which is used for preventing that harmful animals approach an arable, an afforestation area or the like. SOLUTION: This animal-repelling sound generation device comprises an electric source and a piezoelectric buzzer for generating arbitrary audible sounds of 3 to 5 kHz. The animal-repelling sound generation device comprises an electric source, an oscillator, an amplifier, and a speaker, and generates arbitrary or continuously variable audible sounds of 3 to 5 kHz.
|
