Hearing, Biology

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HEARING -

  1. Sound waves struck ear drum, it starts vibrations, these vibrations are carried to MIS → f. ovalis → S. vestibule →  Hellicotrema → S. Tympani → f. rotundus → middle ear.
  2. In this way organ of corti are affected indirectly & sense of hearing is carried to brain by auditory nerve.
  3. Man can hear frequencies as low as 20 cycles per second & as high as 20,000 cps.
  4. The audible range of dog ranges 40,000 cps, and that of bat 1,00,000 cps.

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Note : Common house cricket is having auditory receptors on legs, cockroach on anal cerci and antennae.


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