SHS 430 1st Edition Lecture 4 OUTLINE OF LAST LECTUREI. Audiology Review II. Types of Audiometric testsIII. Tympanogram types IV. Types of Hearing LossOUTLINE OF CURRENT LECTUREI. DocumentaryII. Types of Hearing LossA. Sensori-neural B. Conductive C. MixedD. Central Processing Disorder III. Configurations of Hearing LossA. Degrees of functionIV. Incidence of Hearing LossCURRENT LECTUREI. Documentary- Can your baby hear?-This documentary consisted of a study of baby Elizabeth having a series of trials as she is going through the early stages of her life. At 0-3 months, a baby should startle to loud noise. At 4-7 months, a baby should turn head to the sound. And at 2 years, the child should be talking.-Elizabeth has her first trial at 3 months and 3 days old, and she is started by the sound.-Elizabeth has her second trial at 4 months and 4 days old, and she responds to her name being called and she is also able to locate where the sound is coming from.-Elizabeth is trialed at 5 months and 19 days old, and she is able to locate the loud sound that once startled her before.-She is then tested again at 7 months and 4 days old, and she knows right where to find the sound.-At 8 months and 24 days old, she turns and looks up to the source of the sound.-One of her last trials, she is 9 months and 18 days old and she is able to locate a very low volume sound. She is also tested with toys and she is consistent with hearing the sound and looking directly at the monkey.-Then at 2 years old, Elizabeth and another child have their ears checked and we see examples of Type A & Type B tympanograms.II. Types of Hearing LossA. Sensori-neural loss- A hearing loss due to damage or difficulties in the inner ear or auditory nerve up to the point it intersects with the brain stem. The problems are with the inner ear (cochlea) or along the nerve pathway from the cochlea to the brainstem. B. Conductive Hearing Loss- A hearing loss due to damage or difficulties in outer or middle ear. It involves the pinna, external ear canal, eardrum (TM), middle ear ossicles & muscles, and middle ear cavity.C. Mixed hearing loss- A hearing loss that is primarily sensorineural in nature with conductive involvement D. Central Processing disorder- Auditory processing assumes peripheral structures are intact but the cortex is not processing correctly. Language based children cannot follow auditory sequencing. ADHD and autism children can also fall under auditory processing disorder. [+6, +10 signal to noise ratio]III. Configurations of Hearing Loss-Most common hearing loss in children is flat conductive. High frequency is the most common frequency of hearing loss in kids. A. Degrees of Function0-20 normal21-40 mild41-55 moderate56-70 moderately severe71-90 severe91 + profoundIV. Incidence of Hearing Loss-A child needs a committed family support in order to succeed. -1.1/1000 incidence rate of newborns will have a hearing loss.-23% of newborns will have a hearing loss due to genetics.-3.1% of newborns will have a mild hearing loss.-31.5 million Americans had some kind of hearing loss in 2004.-84% of heard of hearing children are under served.-72,000 children between 6 and 21 years old will receive special ed services under hearing impairments. -130/1000 school children have sort of hearing loss.-1/3 of hearing loss children have additional handicaps.-2.5 is the average age to identify a child with a hearing