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Deafness

Deafness. Hearing Loss. Part of ear not working Includes: outer ear middle ear inner ear hearing acoustic nerve auditory system . Causes. Heredity Diseases Ear infections Otosclerosis Meningitis Injuries Punctured eardrum Nerve damage Loud noises. Preventions .

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Deafness

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  1. Deafness

  2. Hearing Loss • Part of ear not working • Includes: • outer ear • middle ear • inner ear • hearing acoustic nerve • auditory system

  3. Causes • Heredity • Diseases • Ear infections • Otosclerosis • Meningitis • Injuries • Punctured eardrum • Nerve damage • Loud noises

  4. Preventions • Immunizations for childhood diseases • Avoid high decibels • Have hearing tested • Use hearing protectors • Earmuffs • Earplugs

  5. Decibels • Decibel Level Examples include: • Rock concerts, firecrackers (140 decibels) • Loud bass in cars, snowmobiles (120 decibels) • Chainsaw (110 decibels) • Wood shop (100 decibels) • Lawn mowers, motorcycles (90 decibels) • City traffic noise (80 decibels) • Normal conversation (60 decibels) • Refrigerator humming (40 decibels) To reduce potential hearing loss, avoid prolonged exposure to sound above 90 decibels.

  6. Quantification of Hearing Loss • Unable to hear sound at • “Mild” Hearing Loss • 26 – 40 dB • “Moderate” Hearing Loss • 41-55 dB • “Severe” Hearing Loss • 56- 70 dB • “Profound” Hearing Loss • 91 dB & greater

  7. Treatment • Removal of ear wax • Hearing aids • amplify sound • Cochlear Implant • Sign Language • Lip reading

  8. Assistant devices • FM System • Captioning • Text messaging • Telephone amplifiers • Flashing & vibrating alarms • Audio loop systems • Infrared listening devices • Portable sound amplifiers • TTY (Text Telephone or teletypewriter)

  9. Cochlear Implant • Small electronic device • Simulates auditory nerve • Provides “sense” of sound • Used by • Profoundly deaf • Children age 2-6 • Aided by speech therapy

  10. Sign Language • Visually transmitted sign pattern • Hand shapes • Orientation • Movement of hands, arms, body • Facial expressions • ASL (American Sign Language) • Not English • Manual alphabets (finger spelling) • Grammar not connected to English

  11. Sources • CDC (Center for Disease Control) • http://www.cdc.gov/ncbddd/hearingloss/ • Signing Savvy • http://www.signingsavvy.com/

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