MUSI 3702 Lecture Notes - Lecture 10: Conductive Hearing Loss, Audiogram, Equal Temperament
25 May 2016
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Note that approximately 0 db detection thresholds for puretone stimuli at various test frequencies are considered. However, audiologists measure hearing thresholds and hearing loss in db hl (db hearing level) Note that the reference level varies with frequency, according to 0 db. There will be an audiogram on midterm and exam: If hearing loss is tested with headphones on, it is sensorineural hearing loss instead of conductive hearing loss. *sensorineural loss bone line not at 0. *additional blockages causes a gap and another line even lower than the 0 db line. C an octave higher should have a frequency that is doubled the c an octave lower, but it is not. Pythagorean comma = 202. 7287-200 = 2. 7287 hz (or nearly 3 cycles per second sharp!) Takes the pythagorean comma and effectively divides the error between each step of a chromatic scale.
