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common sense - Hearing college
Fun Facts of Hearing
Time:2016-07-29

 Fun Facts of Hearing

  • The hearing organs of cicadas are located in their stomachs
  • The hearing organs of crickets are located in their knees
  • Male mosquitoes hear with thousands of tiny hairs that grow on their antennae
  • Fish do not have ears but they can hear. They “hear” pressure changes through the ridges on their bodies
  • Snakes do not have ears, but their tongues are sensitive to sound vibrations
  • Parrots have a remarkable sense of hearing. In WW1 parrots were kept on the Eiffel Tower in Paris because they heard enemy planes approaching long before anyone else
  • Dogs can hear much higher frequencies than humans, that is why they respond to “silent” dog whistles
  • The ears of a dog are controlled by 18 muscles. This allows the ears to tilt and rotate
  • A giraffe can clean its ears with its 21-inch tongue
  • A cat has 32 muscles in each ear and each ear can turn independently.
  • The smallest bones in the human body are the bones of the middle ear, the malleus, incus and stapes (the hammer, the anvil and stirrup)
  • The stapes is the smallest bone in the body and is only 2,8 mm long
  • The whole area of the middle ear is no bigger than an M&M
  • The cochlea (inner ear) is about the size of a pencil eraser
  • Hearing threshold and the ability to localise sound sources are reduced under water
  • The ear has over 25 000 tiny haircells to help you hear the nuances of sound
  • Your ears don’t switch off during sleep, they continue to hear sounds
  • The Mabaans, an African tribe living in Ghana, live in such solitude and quiet that they have extremely good hearing. They can hear a whisper across a baseball field, even when they are old
  • We hear with the brain. The ear is simply the brain’s “microphone”
  • Hearing loss is the third most common health issue in older adults (after hypertension and arthritis)
  • When a person dies, hearing is generally the last sense to go. The first sense lost is usually sight, followed by taste, smell and touch
  • Your ear drum is less than 17.5 mm in diameter. It moves less than a billionth of an inch when hearing.
  • Nobody knows how the brain tells the difference between high pitched and low pitched sounds, or between loud and soft sounds.• Your ear does more than just let you hear—it also gives you a sense of balance. Maybe you’ve noticed feeling dizzy if you’ve had an ear infection.
  • You get a new ear canal every year! The ear canal skin is constantly growing outward at a rate of 1.3 inches every year. If it didn’t fall off, you’d have a two foot string hanging out of your ear by the time you were 20!
  • The smallest muscle in the body is the stapedius, located in the middle ear. It is only 1.4mm long and controls the smallest bone in the body, the stapes or stirrup bone.
  • 90% of hearing losses can be treated by using hearing aids
  • 16% of doctors routinely screen for hearing loss
  • On average it takes people 10 years to address their hearing loss