PROBLEM TO BE SOLVED: To lower a power consumption and improve efficiency, and to drive a low voltage and improve animal repelling performance.SOLUTION: A resonant circuit (26) including piezoelectric loudspeakers (14-1 and 14-2) is formed. The resonant circuit (26) resonates the piezoelectric loudspeakers (14-1 and 14-2) at a specific frequency or resonates them at a frequency range including the specific frequency, and causes the piezoelectric loudspeakers to output acoustic vibration of the specific frequency or to output the acoustic vibration including the specific frequency.COPYRIGHT: (C)2015,JPO&INPIT【課題】消費電力の低下とともに高効率化を図ること、低電圧駆動化とともに防獣性能を高めることにある。【解決手段】圧電スピーカ(14-1、14-2)を含む共振回路(26)を形成し、前記共振回路(26)により前記圧電スピーカ(14-1、14-2)を特定周波数に共振させまたは該特定周波数を含む周波数域で共振させ、前記圧電スピーカ(14-1、14-2)から前記特定周波数の音響振動を出力し、または前記特定周波数を含む音響振動を出力させる。【選択図】図5
