14 7. The movement of these cilia stimulates the nerve cells, and they send signals to the brain via the auditory nerve.72. travels to the ear and is collect by the outer ear.566. The fluid inside the cochlea vibrates a series of tiny hairs called cilia, which are attached to auditory nerves.4. The ear drum vibrates with these sound waves.1. Something vibrates and creates a sound wave5. The vibration moves tiny bones in the middle ear.These bones carry vibrations into the inner ear to a fluid-filled tube called the cochlea.3. Sound moves into the ear canal. When it reaches the end of the ear canal, the sound waves bump up against the eardrum.8. The brain processes these signals into the sounds we hear9. the brain identifies those sound vibrations as familiar sounds or words
16 Types of hearing lossHearing loss can be categorized by which part of the auditory system is damaged. There are three basic types of hearing loss: conductive hearing loss, sensorineural hearing loss, and mixed hearing loss.
17 Conductive hearing loss affects the passage of sound between the ear drum and the inner ear. Conductive hearing loss usually involves a reduction in sound level or the ability to hear faint sounds. This type of hearing loss can often be corrected medically or surgically.
19 Sensorineural hearing loss damage to the hair cells in the cochlea (this is the sensory hearing organ) or damage to the neural pathways of hearing (nerves). Most of the time, SNHL cannot be medically or surgically corrected. This is the most common type of permanent hearing loss. SNHL reduces the ability to hear faint sounds. Even when speech is loud enough to hear, it may still be unclear or sound muffled.
23 Hearing Loss simulator ACTIVITY 1: Hearing Simulations List emotions that you were feeling as you tried to listen to the hearing loss simulations. Did you notice any changes in your body language and/or temperament? What challenges do you think you would face if you had a hearing loss?
24 ACTIVITY 2: Unfair Spelling Test Were you frustrated as you took the unfair spelling test? If so, describe the challenges you faced taking the test.What would have helped you hear/understand the words better?How would you change your spelling tests for students who are hearing impaired?
27 Hearing Aidssmall electronic devices that amplify sound. Hearing aids aren't effective for everyone. Hair cells in the inner ear must pick up the vibrations that the hearing aid sends and convert those vibrations into nerve signals. So, you need to have at least some hair cells in the inner ear for it to work. And, even if some hair cells remain, a hearing aid won't completely restore normal hearing.
28 Hearing aids are fairly simple devices, consisting of four basic parts: A microphone picks up sound from the environment and converts it into an electrical signal, which it sends to the amplifier.An amplifier increases the volume of the sound and sends it to the receiver.A receiver/speaker changes the electrical signal back into sound and sends it into the ear. Then those impulses are sent to the brain.A battery provides power to the hearing aid.
30 Cochlear ImplantsCochlear implants work better in people with more severe ear damage because they bypass the damaged parts of the ear and send the sound information -- as electrical signals -- directly to the auditory nerve.
31 Parts of a cochlear implant CI have 2 main parts: the processor-the part outside of the body that picks up sounds the implant-inside the body. Receives signals and sends them to the hearing nerves.