LING 290 Lecture Notes - Lecture 6: Basilar Membrane, Speech Perception, Vowel Length
2 Mar 2016
School
Department
Course
Professor
Document Summary
Acoustic cues that enable listeners to differentiate speech sounds. First 3 formants determines the sounds of vowel. Sound of the vocal folds vocaltract measurefrequency. Sounds goes in the ear as sound waves. Sound waves in cochlear fluid travel up and back on the basilar membrane. The length and tension of the fibers in the basilar membrane determine its frequency response at any given location. Z is the grayness of the graph (intensity and volume) Formant frequencies provide perceptual cues to vowel quality. F1 (height) as the height is lower, f1 increases. F2 (front/back) the more front the vowel, f2 increases. F3 (roundness) the rounder of the vowel, f3 decreases. Feature of frequencies changes depends on the new vowel. When with changing formants, they have shorter frequencies. No one-to-one relation between acoustic cue and perceived sound. Same acoustic feature (duration) may cue different dimensions (vowel length, stress, and voicing) Same linguistic dimension may be cue by different acoustic properties.
