Hearing and balance hen receptors in your inner ear

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Hearing and Balance hen receptors in your inner ear are stimulated by a sound W wave, a nerve impulse is sent to your brain. Your brain inter- prets the impulse as a sound. Sound waves enter the external audi- tory canal and cause the eardrum to vibrate. The vibrations cause fluid in the cochlea to move, which stimulates receptor cells to send a nerve impulse to the brain where sounds are interpreted. Receptor cells in the vestibule and the semicircular canals send messages to the brain about your sense of balance. Tiny hairs located in the ear sense movement and send nerve impulses to the brain. The brain then signals muscles to make adjustments to maintain balance. labyrinth auditory ossicles 377 Lesson 4 Ears and Hearing Protection How does the brain know where the source of a sound is located? The ear that is closer to the sound hears it louder and a little sooner than the other ear. The brain picks out this difference and uses it to figure out where the sound is coming from. This is known as binaural hearing . semicircular canals cochlear nerve vestibule cochlea round window eustachian tube auricle oval window eardrum temporal bone mastoid process external auditory canal malleus incus stapes Middle Ear Auditory Ossicles Outer Ear Inner Ear (Labyrinth)
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Should Noise Levels at Concerts Be Controlled? A major concern at concerts is the risk of hearing loss from exposure to loud music. Although outdoor sound levels are monitored by law enforcement to prevent a public nuisance, indoor sound levels usually go unchecked. Should indoor sound levels at public events be regulated? Viewpoint 1: Kyle T., 16 From what I’ve learned about hearing loss, I feel a limit on indoor noise at concerts should be set. It’s impossible to talk to anyone with the music so loud. I have trouble hearing for hours afterward. I’d like to enjoy the music without worrying that my hearing might be permanently damaged. No wonder hearing loss among musicians is so high! Viewpoint 2: Starr L., 16 I agree that loud noise can affect your hearing, but I think passing a law is extreme. Most hearing loss can be avoided if people use common sense. For example, you don’t have to sit or dance right in front of the speakers. If it’s really loud, I think dance organizers should make earplugs available. A lot of musicians and DJs wear earplugs, and they hear the music just fine. 1. Do you think sound levels inside establishments should be monitored to protect against hearing loss? Why or why not? 2. Should earplugs be made available at indoor events? Would teens use them? A C T I V I T I E S 378 Chapter 14 Personal Care and Healthy Behaviors Health Behaviors for Healthy Ears o keep your ears healthy, clean them regularly and always T protect the outer ear from injury and extreme cold. Wear pro- tective gear such as batting helmets when playing sports. A hat that covers both the auricles and the earlobes should be worn in cold weather. Keep foreign objects, including cotton-tipped swabs, out of the ear. Ear infections can damage ear structures and should be
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