Buy backpacks, exercise machines, athletic shoes, and more at Fogdog Sports. Prevention Definition Hearing loss is any degree of impairment of the ability to apprehend sound. Description Sound can be measured accurately. A drop of more than 10 dB in the level of sound a person can hear is significant.
Sound travels through a medium like air or water as waves of compression and rarefaction.
The configuration of the standing wave is determined by the frequency of the sound. Many thousands of tiny nerve fibers detect the highs and lows of the standing wave and transmit their findings to the brain, which interprets the signals as sound. To summarize, sound energy passes through the air of the external ear, the bones of the middle ear and the liquid of the inner ear. It is then translated into nerve impulses, sent to the brain through nerves and understood there as sound. Hearing can be interrupted in several ways at each of the five steps.