Instructables

What ultrasonic frequency actually hurts dogs?

I AM NOT TRYING TO TORTURE ANIMALS.

I'm trying to make a dog repellent device and I need to know how high I can make it before it hurts the dog, because hurting it is not my intention.

Burf3 years ago
Actually, frequency is only a minor contributor to pain and/or hearing loss. Volume (decibels) and plus duration (time of exposure) are what really cause the most serious damage. For example, it only takes a fraction of a second for a sound at 140 decibels or more to cause serious damage. Whereas, one can endure sound at around 100 decibels for an hour or two with minimal or no damage.
I think the better idea is to create a noise which frightens an animal rather than causes pain or irritation.
A dog trainer I once hired, showed me a trick that is quite effective; put four or five marbles into a large, empty can and cap it. If you shake it vigorously, the noise frightens most dogs and cats so much they cease any aggressive actions.
martzsam (author)  Burf3 years ago
Thanks!
CrLz Burf3 years ago
Exactly-

The volume is what causes the effect.

The reason to operate in "ultrasonic" frequencies is because you/other humans won't be able to hear the loud noise, it is beyond our hearing ability.

These devices can blast away at animals, while we remain oblivious.

Search for what decible range is safe threshold for dogs.
Kiteman Burf3 years ago
Stick that can on an off-kilter motor, linked to the same sort of PIR detector that triggers garden lights, and you have an automatic animal-scarer.
To be effective you will have to play the frequency through a subwoofer.
















( Sorry, that was my attempt at a joke.)