Physiology Of The EAR

Source - britannica

Function of the external ear - The function of the external ear in human hearing are as follows :-

  • The pinna "collects" the sound waves from the all direction and directs them into the ear canal
  • It also males the higher frequency sound (i.e 5000to 7000Hz) a little louder by "resonating" it 
  • The ear canal helps in smooth transmission of sound waves from the pinna to the ear drum it also amplifies an make certain frequencies (around 200Hz) Sound louder by its Natural resonance
  • Because of its "s" shape the ear canal protects the ear drum and other delicate structures in the middle ear by preventing the entry of any foreign body such as in sects worms etc,