Šikšnosparniai echolokacijos dėka gali orientuotis visiškoje tamsoje. They send short audio signals, which is reflected from various objects and echo back back. Fast and accurate analysis of bat echo brain helps the animal to determine the distance, object size and structure, and often the speed of a moving object. The sound is a very high frequency and inaudible to man. This sound is called ultrasound. The human audibility threshold 16-20 kHz, while living in Lithuania bats emit 20-60 kHz sound.

Bat-frequency sound recording examples. Oscillogram - Top; spektograma - bottom

Communicating with each other mammals using lower-frequency sounds, about 20 kHz , so often they are audible to humans. Bat ultrasound produces sound strings, located in the throat. Sound bats spend through the mouth or through the nose. Bat and most of the other species of bats spend the sound through the mouth, nasal sound emitted by quick-eared brown. The European plačiaausis allows two types of signals - one through the mouth, other through the nose. Each echo signal is characterized by certain parameters, you can convey graphically. These parameters help to distinguish between bat species. Ultrasonic bat record ultrasonic bat detectors specific, that makes us sound inaudible audible. Bats hunt not only with ultrasound. Quick-eared Brown has big ears, so hear the scrape of insects ropojančių.

Often you can hear the case, that bats are blind or can not see the day. This is not true. Indeed, their vision is not sharp enough, but see they are well. Echolokuodami bats detect small objects, Large objects are detected using vision. Vision needs and migration - from a distance helps observed landmarks: trees, riverbeds, forests, edge of the lagoon, etc..

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