do you know if ultrasonic pest repellants work?



Answers:
yes it dose work ,but i wont prescribe it ,simply because ultrasonic sound or wave length cannot be heard by humans as it is above 20000dbu but is it noise for mosquitoes and fly. They have wide hearing range. but being such a high frequency its vibration dose touches our delicate hearing organs and a quite possibility of tissue getting damage.specially care should be taken when you have children around.
Thanks for reading.

Other answers:
No they dont work, its a bunch of BS
No they dont work, its a bunch of BS
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