SHS 430 1st Edition Lecture 1OUTLINE OF LAST LECTUREFirst day of class- we reviewed our syllabusOUTLINE OF CURRENT LECTUREI. Basic DefinitionsII. Degrees of LossIII. Types of hearing loss configurationsCURRENT LECTUREI. Basic Definitions1) CONDUCTIVE HEARING LOSS- a hearing loss due to damage or difficulties in outer or middle ear.2) SENSORINEURAL HEARING 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.3) MIXED HEARING LOSS- a hearing loss that is primarily sensorineural in nature with conductive involvement.4) PERIPHERAL AUDITORY SYSTEM- auditory pathways involving outer, middle, inner ear systems and auditory nerve up to the brain stem.5) CENTRAL HEARING LOSS- hearing disorder involving auditory pathways from the brain stem and higher; normal peripheral hearing usually present.6) AUDIOGRAM- a graph of an individual’s audiometric thresholds at discrete pure tone frequencies. Usually includes 250Hz, 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz and 8000 Hz butmay also include .5 octave points.7) AUDIOMETRIC THRESHOLD- individual’s minimal level of response 50% of the time; the softest sound required to produce a response.8) AIR CONDUCTION TESTING- determines thresholds through earphones. Sound traveling its customary path through outer, middle and inner ears. 9) BONE CONDUCTION TESTING- determining thresholds through stimulation of inner ear directly, by-passing outer and middle ears.II. Degrees of loss0-20 dB normal hearing 21-40 dB mild hearing loss41-55 dB moderate hearing loss56-70 dB moderately severe hearing lossThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.71-90 dB severe hearing loss91 dB & above profound hearing loss III. Types of hearing loss configurations Flat- less than a 10 dB change from one test frequency to the next.Sloping- is used in conjunction with a hearing loss increasing in severity from the low to the high frequencies. Gradually sloping- a 10 dB change at each test frequency.Rapidly sloping- more than a 10 dB change at each test frequency.Rising- is used in conjunction with a hearing loss decreasing in severity from the low to the high frequencies.Gradually rising- a 10 dB change at each test frequency.Rapidly rising- more than a 10 dB change at each test frequency.Notch- one frequency exhibiting significantly greater hearing loss (30 dB or more) than all other test frequencies. Fragmentary- responses obtained at no more than three test