PSY 3108 Chapter Notes - Chapter 6: Spherical Coordinate System, Basilar Membrane, Psychometric Function
9 Dec 2016
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Document Summary
Experimental methods (min audible field + min audible pressure) Minimum audible thresholds of intensity vary across different frequencies. Sounds themselves aren"t loud; our perceptions of sounds can be loud if intensity high. When absolute thresholds mapped onto sound frequency as a function of sound intensity, you see that the minimum audibility curve is lowest (lowest sound level requirement in dbspl) from. 2000-4000hz, meaning that sound detection is best at these frequencis. Detection performance deteriorates as sound frequencies move away in either direction from this range. The frequency range that are best detected by our hearing correspond to conversational speech frequencies. Psychometric function: function of a physical quantity and behaviour. shows one threshold. Shows how threshold of one physical quantity varies as a function of the other. Spatial integration: binaural vs monaural presentation accounts for a 6db difference in loudness. Temporal integration: minimum audible threshold increases if duration of sound is below 200ms.
