In scientific
research, a bat is released in a dark room in which several parallel wires have
been installed and the distance between the wires is very close. Film
recordings revealed that the bat could fly through the wires without hitting
them. The bat’s vision is not very special. If a bat flies through the night by
relying on its vision, it will run into walls as often as we do.
Bats like to
prey on insects for dinner. How can a bat fly in the night without hitting the
objects around it and catch small insects? Bats regularly transmit ultrasonic
sounds through their mouths and noses. These sound waves echo (are
reflected) back, giving image of the objects around the bats. This process is
called echolocation. Hence, bats use echoes (reflected sounds) to
determine the surrounding situation and to locate their prey. Their big
uniquely shaped ears help them determine from where the echoes come.
Often we see the bats fly at
night. They fly in the dark so quickly without bumping everything into it. so
how bats are able to fly in the dark?
Vision bat very active at night
is bad if you have to look at long distances. To be able to move and fly
quickly in the darkness they use Echoloration. Echoloration the transmission of
sound waves to find objects, food and to detect obstacles. This high frequency
sound that comes from the mouth of the bat outside the range of human hearing.
Some species also produce these sounds bat from the middle of the nose when
eating while flying.
The workings of this is
echoloration out sound waves away from the bat and then bounce off the objects
around and form an echo and bounce back to the bat. Echoes that bounce that
gave information about the size, shape, direction and distance of the object to
the bat.
Some bats are
very skillful in finding objects by echolocation, so even in pitch darkness
they can detect wires that are arranged in parallel and get past without
hitting them. Currently, investigations are being conducted to simulate the
bat’s skill in sharply distinguishing surrounding objects and develop accurate
mine-detection systems on mine-sweeping ships.
Sound is generated by
vibrations. However how come you do not hear any sound when you move your arm
back and forth in a regular fashion? The fact is, you do produce sound but the
frequency is very low (infrasonic sound) to be heard by your ears. Some animals,
such as crickets can hear infrasonic sounds. Elephants communicate among each
other by infrasonic sounds. Volcanoes and earthquakes transmit infrasonic
sounds. Even certain machines in factories vibrate at infrasonic frequencies.
These sounds can endanger the workers who are exposed to them for an extended
period. Although these infrasonic sounds are inaudible, the energy carried by
the waves can alter processes in the body.
cool Knowledge