1. Author: Dr. Sam Slike Bloomsburg University of Pennsylvania Date submitted to deafed.net – February 7, 2006 To contact the author for permission to use this PowerPoint, please e-mail: sslike@bloomu.edu sslike@bloomu.edu To use this PowerPoint presentation in its entirety, please give credit to the author.

2. FACTORS OF PRIME IMPORTANCE: Defining the Hearing Loss of a Child Dr. Samuel B. Slike

3. Age of Onset Congenital Prelingual Adventitious (Acquired) Postlingual

4. Etiology Diseases: Rubella (pg. 17) http://www.cdc.gov/nip/diseases/rubella/vac-chart.htm http://www.cdc.gov/nip/diseases/rubella/vac-chart.htm Encephalitis (pg. 18) http://www.mayoclinic.com/invoke.cfm?id=DS00226 http://www.mayoclinic.com/invoke.cfm?id=DS00226 Bacterial Infection (pg. 19) http://www.drugdigest.org/DD/HC/HCIntro/0,4043,6,00.html http://www.drugdigest.org/DD/HC/HCIntro/0,4043,6,00.html Meningitis (pg. 33) http://www.meningitis.org/content.jsp http://www.meningitis.org/content.jsp

5. Etiology (cont.) Diseases (cont.) Typhoid Fever (pg. 20) http://www.cdc.gov/ncidod/dbmd/diseasinfo/typhoidfever_g.htm http://www.cdc.gov/ncidod/dbmd/diseasinfo/typhoidfever_g.htm Rh Incompatibility (pg. 21) http://pregnancytoday.com/reference/articles/rhfactor.htm http://pregnancytoday.com/reference/articles/rhfactor.htm Cytomegalovirus (CMV) (pg. 37) http://www.cdc.gov/ncidod/diseases/cmv.htm http://www.cdc.gov/ncidod/diseases/cmv.htm

6. Etiology (cont.) Heredity Consanguinity (pg. 22) http://www.consang.net/summary/index.html http://www.consang.net/summary/index.html Marriages of the Deaf Waardenbergs Syndrome (pg. 36) http://inst.augie.edu/~hanavan/ear/PAX3.htm http://inst.augie.edu/~hanavan/ear/PAX3.htm

7. Etiology (cont.) Accidents Premature Birth Noise Exposure

8. Severity of Hearing Loss Mild 2040 dB Moderate4060 dB Severe6080 dB Profound 80+ dB

9. NOTE: Speech Frequencies Indicators: For Bone Conduction- [ red = right ear ] blue = left ear For Air Conduction- O red = right ear X blue = left ear

10. Typical Sound Levels 0 dB = Threshold of Hearing 33 dB = Soft Whisper at 5 feet 50 dB = Light Traffic at 100 ft (average residence) 70 dB = Fright Train at 100 ft (vacuum cleaner at 10 ft) 80 dB = Inside a Sports Car at 50 mph 90 dB = Subway Train at 20 ft 110 dB = Riveting Machine (operators position) 120 dB = Jet Takeoff at 200 ft (level of discomfort) 130 dB = 50 hp Siren at 100 ft (level of tickle) 140 dB = Level of Pain

11. Image found at: http://www.gohear.org/image/graph.gifhttp://www.gohear.org/image/graph.gif

12. Location of Impairment External Ear Middle Ear Cochlea The Organ of Corti The Auditory Nerve Within the Central Nervous System

13. Type of Hearing Loss Conductive Sensorineural Mixed

14. Other Factors Audiometric Exam Intelligence of Child Age of Instigation of Education/Training Amount/Type of Education/Training Age of Fitting/Appropriateness of Hearing Aid/Auditory Trainer Family Climate

15. High Risk Register See Handout Pg. 16 Pgs. 40-42