SHS 430 1st Edition Lecture 2OUTLINE OF LAST LECTUREI. Basic DefinitionsII. Degrees of LossIII. Types of hearing loss configurationsOUTLINE OF CURRENT LECTUREI. Audiology Review II. Types of Audiometric testsIII. Tympanogram types IV. Types of Hearing LossCURRENT LECTUREI. Audiology Review- An audiogram is a graphic display of audiometric data. Air conduction checks the entire airway. Bone conduction vibrates the bones of the skull to test the inner ear. Humans can hear from 20 Hz – 20,000 Hz. 25 dB or below is normal. Before universal screening, there was “risk registry.” The issue was that over 50% of kids with impairment were not on registryII. Types of Audiometric Tests- -Behavioral audiometry is pure tone testing under earphones or with inserts or warble tone/narrow band noise in the sound field.-Threshold testing can also be accomplished with a bone conduction oscillator. Threshold testing may be by observation [behavioral observation audiometry-BOA], play audiometry, visual reinforcement audiometry, and conventional behavioral responses. -Speech reception threshold [SRT] two syllable words called spondees are presented and thechild is able to repeat the two syllable words with equal stress. A down 10 to up 5 threshold search is completed until 50% criteria at minimal intensity is achieved.-Speech discrimination or word recognition is when a one syllable, phonetically balanced words are used and a carrier phrase is presented “you will say” and a word is given for the patient to repeat. You could use conventional behavior such as “if you hear the sound, say yes!”-Tympanometry is a general assessment of middle ear function. A probe tip is inserted in theear canal and pressure is varied.These 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.-Otoacoustic emission testing [OAE] can be done in a screening or diagnostic/complete format. There are two primary types- Distortion product otoacoustic emission [DPOAE] and Transient evoked otoacoustic emission [TEOAE]-Auditory Brainstem Response [ABR] stimulates the VIII cranial nerve acoustically and the nerve gives off a typical signature response if it is working properly and peripheral hearing is intact. III. Tympanogram Types -Type A is normal [two type of sub A]A sub S [shallow]A sub D [disarticulated]-Type B is flat, generally means effusion if the volume is normal. [Conductive loss is typically Type B.]-Type C is negative pressure, and is typically seen with cold or allergies or Eustachian tube isn’t working well.III. Types of hearing lossWe introduced the types of hearing loss:-Conductive-Sensori-neural