CDIS 3123 Lecture Notes - Lecture 12: Brainstem, Auditory Cortex, Auditory Processing Disorder

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Redundancy in hearing, dichotic measures, and speech recognition. Intrinsic redundancy: abundance of information present in the central auditory system due to the excess capacity inherent in its richly innervated pathways: extrinsic redundancy: abundance of information present in the speech signal: Other considerations: open set: choice can be from among all available targets in the language. More difficult: closed set: choice is from a limited set; multiple choice. Less difficult task used more for pediatric exams. In addition, it is more efficient and engaging: familiarizing the patient with spondees is a common and recommended practice in establishing srt. If patient responds correctly, decrease intensity by 10 db. If patient does not respond, increase intensity by 5 db: ascending method: Increase intensity by 5 db until responds then bracket down 10, up 5. If patient has hearing loss, level of presentation is generally 75-85 db hl to quickly identify pipb max.

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