A cat whistle is a high-pitched whistle used for training a cat not to misbehave. However, using a cat whistle too often can also cause the cat undue stress.
Cats have delicate ears and high-pitched sounds can cause irritation. The noise of a cat whistle resembles noises made by animals such as birds, rodents and other small creatures, so the cat will come to the whistle thinking it's prey. Cats have ultrasonic hearing, giving them the ability to hear sounds from 45 to 60,000 hertz. Cat owners should be aware of this and eliminate noises they notice are bothersome to their pets.