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A cat repeller is a device or substance used to discourage cats from entering an area, or to encourage them to leave if they do enter. Such deterrents are most commonly used by gardeners, in order to prevent damage to their gardens, to avoid cat feces , or to protect birds .
Bird scarers is a blanket term used to describe devices designed for deterring birds by startling, confusing or otherwise repeling them, typically employed in commercial settings by farmers to dissuade birds from consuming and defecating on recently planted arable crops. Numerous bird scarers are also readily available to the public direct to ...
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Acoustic levitation is a method for suspending matter in air against gravity using acoustic radiation pressure from high intensity sound waves. [1] [2]It works on the same principles as acoustic tweezers by harnessing acoustic radiation forces.
Grisly video has emerged of a blood-soaked woman after she was allegedly caught killing and eating a cat in Ohio — but she’s neither a Haitian migrant nor anywhere near Springfield.
The ultrasonic vocalizations emitted by rats and mice have been categorized. There are three classifications: 22-kHz vocalizations, 40-kHz vocalizations, and 50-kHz vocalizations. [ 1 ] The 40-kHz calls are short in duration, lasting anywhere from 80-150 milliseconds, while the 50-kHz calls tend to be even shorter, lasting anywhere from 20-100 ...