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Seung-ju Hong
   Introduction of bats

   Wave and Ultrasound

   Ultrasound used by bats
     Bats are the only mammal that can fly.

     The structure of bat’s body is different from bird structure of body.

   Bats are divided into two groups; micro bats and mega bats.

   Bats are nocturnal animal; they are active at night.

   Most bats cannot see at night. Therefore, they use echolocation producing
    ultrasound, which allows bats to be active at night.

   Bats hunt small insects such as flies and they avoid obstacles by using
    ultrasound.

   Bats are distributed all around the world except for north pole and south
    pole.
   Wave is a disturbance that travels through material and accompanied by a transfer of

    energy.

   The movement of ultrasound travels through a medium such as air.

   Ultrasound is a cyclic sound pressure wave with a frequency, which is greater than

    human hearing.

   Bats can make 50~90 KHz (a unit of frequency) and hear the sound reflected that they

    made.

   Frequency of bat’s ultrasound is directive; It is not absorbed even into the water.

   This enables bats to be active at night and catch insects in darkness.
   It is used for fish finder, echo-sounder and for the medical.

   An oscillator using piezoelectric effect of crystal flake

    produces ultrasound.
   Bats use echolocation, biological frequency, in order to make
    ultrasound.



   When bats emit ultrasound from their mouth, they can hear high
    frequency that they make while flying; they listen to the vibration
    that return from various objects near them.
   Bats use ultrasound for navigation.



   They catch flying insects in darkness while flying in full speed.



   Their sophisticated echolocation permits them to distinguish between a
    moth and a falling leaf.
   http://www.scienceall.com/dictionary/dictionary.sca?to
    do=scienceTermsView&classid=&articleid=254940&bbs
    id=619&popissue
   http://en.wikipedia.org/wiki/Ultrasound
   http://www.wisegeek.com/what-are-bats.htm
   http://whatis.techtarget.com/definition/sound-wave
   http://wiki.answers.com/Q/How_do_bats_use_ultrasoun
    d_to_navigate
   http://hyperphysics.phy-
    astr.gsu.edu/hbase/sound/usound.html
   http://12-11.wikispaces.com/how+bats+fly
   http://terms.naver.com/entry.nhn?docId=426871&mob
    ile&categoryId=1659
   http://www.bats.org.uk/pages/types_of_bats.html

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Wave of bats project

  • 2. Introduction of bats  Wave and Ultrasound  Ultrasound used by bats
  • 3. Bats are the only mammal that can fly.  The structure of bat’s body is different from bird structure of body.  Bats are divided into two groups; micro bats and mega bats.  Bats are nocturnal animal; they are active at night.  Most bats cannot see at night. Therefore, they use echolocation producing ultrasound, which allows bats to be active at night.  Bats hunt small insects such as flies and they avoid obstacles by using ultrasound.  Bats are distributed all around the world except for north pole and south pole.
  • 4. Wave is a disturbance that travels through material and accompanied by a transfer of energy.  The movement of ultrasound travels through a medium such as air.  Ultrasound is a cyclic sound pressure wave with a frequency, which is greater than human hearing.  Bats can make 50~90 KHz (a unit of frequency) and hear the sound reflected that they made.  Frequency of bat’s ultrasound is directive; It is not absorbed even into the water.  This enables bats to be active at night and catch insects in darkness.
  • 5. It is used for fish finder, echo-sounder and for the medical.  An oscillator using piezoelectric effect of crystal flake produces ultrasound.
  • 6. Bats use echolocation, biological frequency, in order to make ultrasound.  When bats emit ultrasound from their mouth, they can hear high frequency that they make while flying; they listen to the vibration that return from various objects near them.
  • 7. Bats use ultrasound for navigation.  They catch flying insects in darkness while flying in full speed.  Their sophisticated echolocation permits them to distinguish between a moth and a falling leaf.
  • 8. http://www.scienceall.com/dictionary/dictionary.sca?to do=scienceTermsView&classid=&articleid=254940&bbs id=619&popissue  http://en.wikipedia.org/wiki/Ultrasound  http://www.wisegeek.com/what-are-bats.htm  http://whatis.techtarget.com/definition/sound-wave  http://wiki.answers.com/Q/How_do_bats_use_ultrasoun d_to_navigate  http://hyperphysics.phy- astr.gsu.edu/hbase/sound/usound.html  http://12-11.wikispaces.com/how+bats+fly  http://terms.naver.com/entry.nhn?docId=426871&mob ile&categoryId=1659  http://www.bats.org.uk/pages/types_of_bats.html