PSY 3108 Lecture Notes - Lecture 10: Absolute Threshold, Psychometric Function, Monaural
17 Feb 2017
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Document Summary
Loudness is the subjective perceptual quality of sound related most directly to pressure or intensity. But loudness also depends on frequency of sound, among other things (x and y axis) The pressure at which loudness is greater than 0(i. e. , absolute threshold) varies according to hz. Also, where human speech has most energy (social aspect to measurements) Function of physical quantity & behaviour (e. g. , stimulus intensity and perceived magnitude) Shows how threshold on one physical quantity varies as a function of the other (e. g. , frequency and sound level) Other factors affecting loudness: binaural vs. monaural presentation, duration of sound: Threshold is 6 db lower with two ears (spatial integration) Threshold increases below 200 ms (temporal integration) Any sensor (biological or artificial) must integrate signals across a certain range of space and time. Longer/larger integration provides greater sensitivity but lower acuity (details can be lost) In between minimum audibility curve and temporal threshold for pain.
