Deafness and Hard of Hearing. Chapter 10. Kelly Talbot Kristin Milam Marc Truelove Stacie Wommack-Entzminger. Deafness and Hard of Hearing Defined.
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Prelingually Deaf: Having lost the ability to hear before developing language.
a. Approximately 95% of all deaf children and youth are prelingually deaf. b. One in ten of those who are prelingually deaf have at least one deaf parent
Postlingually Deaf: Having lost the ability to hear after developing language
1. Caught by the pinna or auricle and 2. Funneled down the auditory canal of the listener;
3. Sound waves then travel to the middle ear 4. Sound waves cause the eardrum to vibrate. 5. Vibrations cause the hammer and anvil to move and the stirrup to oscillate
7. Which are then transmitted to the fluid contained in the compartments of the cochlea.
8. The mechanical variations produced by the stirrup on the fluid are
9. Transmitted to the basement membrane of the cochlea. This membrane supports the hair cells, which respond to different frequencies of sounds. when the spines or cilia displace the fluid that surrounds them,
10. This produces electrochemical signals, which are sent thru nerve cells along the auditory nerve to the brain where the signals are perceived as tones.
1. Pedro Ponce de Leon (1500’s): A spanish monk credited with being the first teacher of students who were deaf.
2. William Holder and John Wallis (1600’s): credited with beginning educational programs in England for individuals who were deaf.
By the 1700’s, schools for the deaf were established in England, Edinburgh, France, and in Germany.
3. Thomas Hopkins Gallaudet brought Laurent Clerc, a deaf Frenchman and a well-known educator of the deaf, to the United States. Started Gallaudet University in 1817, the first federally funded university serving deaf undergraduate and graduate students.
Maternal vibrations, Rubella- rubella contracted during pregnancy.
Meningitis-bacterial rather than viral.
Otitis Media-infection of the middle ear.
Heredity- 150 different types of genetic deafness have been identified
Noise- the major cause of hearing loss in this country.Causes of Deafness
Instruction for Hard of Hearing Students: vibrations,
43% present lessons orally
Proactive good peer relationships
Parents are resourceful
Instructional Methods for Deaf Students
Total Communication Approach
**Only 5% of teachers of the deaf use ASL, finger spelling is more commonEducation and the School Child
Instructional Methods for Deaf Students vibrations,
$32,820- Enrolled Undergraduate
$39,229- Bachelor’s Degree
$41,000- Master’s Degree
Individually determined by the ARD committee
based on following questions: