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2. 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.

3. Bat detector - Wikipedia

   en.wikipedia.org/wiki/Bat_detector

   A bat detector is a device used to detect the presence of bats by converting their echolocation ultrasound signals, as they are emitted by the bats, to audible frequencies, usually about 120 Hz to 15 kHz. There are other types of detectors which record bat calls so that they can be analysed afterward, but these are more commonly referred to by ...

4. Animal echolocation - Wikipedia

   en.wikipedia.org/wiki/Animal_echolocation

   Animal echolocation. A depiction of the ultrasound signals emitted by a bat, and the echo from a nearby object. Echolocation, also called bio sonar, is a biological active sonar used by several animal groups, both in the air and underwater. Echolocating animals emit calls and listen to the echoes of those calls that return from various objects ...

5. Common noctule - Wikipedia

   en.wikipedia.org/wiki/Common_Noctule

   When hunting, it often starts flying in early dusk, earlier than most European bats. It flies high above the forested areas that are its preferred habitat, reaching speeds of up to 50 km/h (31 mph). [21] Common noctule bats mainly eat beetles, moths and winged ants. It is known for its high-flying foraging technique, often hunting at altitudes ...

6. Doppler shift compensation - Wikipedia

   en.wikipedia.org/wiki/Doppler_shift_compensation

   This dynamic frequency modulation is called the Doppler shift compensation (DSC), and was discovered by Hans Schnitzler in 1968. [1] CF bats employ the DSC mechanism to maintain the echo frequency within a narrow frequency range. [2] This narrow frequency range is referred to as the acoustic fovea. By modulating the frequency of the outgoing ...

7. Daubenton's bat - Wikipedia

   en.wikipedia.org/wiki/Daubenton's_bat

   Bats emit sounds too high in frequency for humans to detect, and interpret the echoes created to build a "sound picture" of their surroundings. Daubenton's bat emits echolocation calls at frequencies between 32 and 85 kHz, though typical calls peak at 45 to 50 kHz; the calls have a duration of 3.3 ms.