Harmful animal repeller having a ultra cardioid directivity loudspeaker being rotated toward a direction of detected sound

摘要

The present invention relates to a pest repelling device having a superdirectivity speaker rotating in a direction of a sensed sound. The speaker detects sounds from a plurality of directional microphones installed in all directions and detects a sound of a pest emerging from a cultivated area such as a rice paddy, filed, etc., wherein a pest repelling device, which has a superdirectivity speaker capable of rotating in a direction in which the sounds are detected, is installed. In addition, the speaker detects a direction of a sound of the directional microphone which detects the loudest signal among the sounds and rotates in the direction of the sound detected by driving a motor with a rotation angle controlled according to a control of a control unit. Moreover, the speaker outputs a directional sound in a specific direction in which the pest appears with an ultrasonic signal having a modulated sound signal to exterminate the pest from the superdirectivity speaker rotated in the direction of the detected sound. Therefore, the speaker has an effect of reducing damage to crops by driving the pest shown in the cultivated area.