- heterodyne harmonic
- гармоника гетеродина
English-Russian dictionary of telecommunications. 2015.
English-Russian dictionary of telecommunications. 2015.
Bat detector — The term bat detector is usually used to describe a device used to detect the presence of bats by converting their echolocation ultrasound signals to audible frequencies as they are emitted by the bats. There are other types of detector which… … Wikipedia
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