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2. Acoustic harassment device - Wikipedia

   en.wikipedia.org/wiki/Acoustic_harassment_device

   Acoustic harassment and acoustic deterrents are technologies used to keep animals [1] and in some cases humans away from an area. Applications of the technology are used to keep marine mammals away from aquaculture facilities and to keep birds away from certain areas (for instance in the vicinity of airports and blueberry fields).

3. Bird scarer - Wikipedia

   en.wikipedia.org/wiki/Bird_scarer

   Ultrasonic devices are static sound-emitting bird deterrents, which, in theory, will annoy birds to keep them away from enclosed or semi-enclosed areas. Ultrasonic scarers are not harmful to birds, however, there is debate around birds' ability to hear these frequencies at loud enough decibels.

4. Bird control - Wikipedia

   en.wikipedia.org/wiki/Bird_control

   Sounds include predator cries and distress calls of a variety of birds to discourage pest birds from coming into an area. Common locations for these devices include vineyards, reclamation plants, airports, and other open areas. There are also ultrasonic avian deterrents, which are inaudible to human ears. [2] Ultrasonic bird repeller, 2008

5. Fort Worth airports use sirens and pyrotechnics to scare ...

   www.aol.com/fort-worth-airports-sirens...

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6. Electronic pest control - Wikipedia

   en.wikipedia.org/wiki/Electronic_pest_control

   Electronic pest control is the name given to any of several types of electrically powered devices designed to repel or eliminate pests, usually rodents or insects. Since these devices are not regulated under the Federal Insecticide, Fungicide, and Rodenticide Act in the United States, the EPA does not require the same kind of efficacy testing that it does for chemical pesticides.

7. How to stop cats killing birds and keep the peace in your ...

   www.aol.com/stop-cats-killing-birds-keep...

   12 Pack Scat Mats | Amazon. These mats provide a deterrent without hurting your pets. You can place them underneath a bird feeder to stop your cat getting close enough to cause chaos.