PSYC 367 Lecture Notes - Lecture 8: Fourier Analysis, Musical Tone, Exponentiation
Document Summary
Describe an equal loudness contour, and describe specific points on a set of contours in terms of their relative loudness. Describe a critical bandwidth masking experiment, explain why the masking effect is asymmetrical, and discuss what masking experiments tell us about pitch perception. State ohm"s acoustical law, and discuss how the ear might act as a fourier analyzer. Not equivalent to intensity or sound pressure level (db) Different sound pressure levels can result in the same perceptual experience. Increases with duration of sound (up to 200 ms) Studied with loudness matching, loudness scaling and loudness discrimination experiments. Psychoacoustics: study of the psychological correlates of the physical dimensions of sound. Equal loudness contour: shows the sound pressure level necessary for comparison tones between 20 and 10,000 hz standard tone of a fixed sound pressure level (indicated by the number on each curve) matching. Red curve: audibility threshold; minimum intensity needed to just hear the sound.
