提高认知才能开阔眼界
认人待物，不断学习，提高商业和经济方敏锐的洞察力
正文
Mice have a hearing range that extends into the ultrasonic range, from about 1 kHz to 100 kHz, which is much higher than the human range of 20 Hz to 20 kHz. Mice are most sensitive to frequencies between 12 kHz and 24 kHz.
Ultrasonic rodent repellers are not effective pest control for mice because mice and other rodents can quickly become accustomed to repeated sounds. Ultrasonic sound waves may also be blocked by the objects mice hide behind, under, and in。
我家也有几个，车库有一个功率大驱鸟的好像有些作用，但是吵人
评论
目前还没有任何评论
登录后才可评论.
