CMD 278 Lecture Notes - Lecture 9: Bell Labs, Sound Pressure, Audiology
15 Nov 2016
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It is difficult to create a satisfactory definition. Exam 3 must be defined differently at each frequency in dbspl: hearing sensitivity varies across frequency: normal hearing and hearing loss. Extensive research in this area began in the (cid:883)93(cid:882)"s at bell telephone laboratories. Large amounts of young adults (18-25 years old) with no auditory pathology were: this median became the (cid:498)zero(cid:499) decibel hearing level (cid:523)(cid:882) db(l(cid:524) Single detection theory (2/3 times) in clinical audiology. Audiogram = record of thresholds at these frequencies. Thresholds = lowest level of stimulus that the subject responds to at least 66% (cid:498)normal(cid:499) hearing typically = thresholds between (cid:882)-25 dbhl. Examines a listener"s ability to respond to the presence of a stimulus under. A psychophysical theory that outlines the possible outcomes (subject responses) conditions of uncertainty when a listener is being tested. Outcomes #1 and #4 are accurate responses.
