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More about Hearing

HOW DOES SOUND OCCUR

Sound is created when the air is subjected to a disturbance – both the vibrations from vocal cords and the pounding of a stamping machine create sound waves. The waves are transmitted through the air and captured by the eardrum, from which they move into the cochlea in the inner ear, which contains hair cells with tiny cilia. The cilia move when the sound waves reach them, and that movement is translated into nerve impulses, which are transmitted to the brain. The waves become sound.




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© Magnus Johansson, Peltor AB







 THE AUDITORY SYSTEM

 » How does sound occur
 » The auditory system 
 » The outer ear 
 » The middle ear
 » The inner ear
 » Hearing
 » Exposure to noise 
 » Hearing impairment
 » The concept of equal energy
 » How to measure noise levels
 » Choose right hearing protection
 » Do not over attenuate
 » Noise regulations