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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. 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.

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

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6. Scientists Are Using ‘Googly Eyes’ to Scare Birds Away From ...

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7. Bird control - Wikipedia

   en.wikipedia.org/wiki/Bird_control

   There are also ultrasonic avian deterrents, which are inaudible to human ears. [2] Ultrasonic bird repeller, 2008. In 2013, Dr. John Swaddle and Dr. Mark Hinders at the College of William and Mary created a new method of deterring birds and other animals using benign sounds projected by conventional and directional (parametric) speakers. [8]

8. Shishi-odoshi - Wikipedia

   en.wikipedia.org/wiki/Shishi-odoshi

   A shishi-odoshi breaks the quietness of a Japanese garden with the sound of a bamboo rocker arm hitting a rock.. Shishi-odoshi (literally, "deer-frightening" or "boar-frightening"), in a wide sense, refers to Japanese devices made to frighten away animals that pose a threat to agriculture, including kakashi (), naruko (clappers) and sōzu.

9. Ultrasound avoidance - Wikipedia

   en.wikipedia.org/wiki/Ultrasound_avoidance

   Ultrasound avoidance is an escape or avoidance reflex displayed by certain animal species that are preyed upon by echolocating predators. [1] Ultrasound avoidance is known for several groups of insects that have independently evolved mechanisms for ultrasonic hearing.