Facts about the Ears

1. 07

   Human ears can locate the source of a sound within 1 to 3 degrees of accuracy by comparing arrival times and intensity differences between the two ears, a process called binaural hearing.

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2. 06

   Sudden loud noises above 85 decibels can damage the hair cells in the cochlea, and prolonged exposure to noise at this level causes permanent hearing loss that cannot be reversed.

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3. 05

   Balance and spatial orientation are controlled by the vestibular system in the inner ear, which uses fluid-filled semicircular canals to detect head movements and acceleration in three dimensions.

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4. 04

   Located in the inner ear, the cochlea contains approximately 16,000 hair cells that convert sound vibrations into electrical signals sent to the brain via the auditory nerve.

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5. 03

   Tiny bones called the malleus, incus, and stapes in the middle ear amplify sound vibrations by approximately 30 times before they reach the inner ear.

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6. 02

   The human ear canal produces cerumen, a waxy substance that protects and lubricates the ear while naturally migrating outward to self-clean approximately every 3-6 months.

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7. 01

   Vibrations between 20 and 20,000 Hz are the typical frequency range human ears can detect, with sensitivity peaking around 3,000 Hz.

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