Articulation and Resonance

Articulation and Resonance - Articulation and Resonance...

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Articulation and Resonance Speech sounds are made at the level of the larynx (some consonants are made at the level of the vocal folds) These are further modified by resonating in the vocal tract Articulation: movements of the tongue, small movements of the pharynx, soft palate, lips, and the jaw Tongues is the major influence vowel quadrilateral position changes the speech sound lips can be rounded or flattened also changes the resonance and resulting speech sounds Vocal tract: Larynx to the lips (or nares in the case of nasal sounds) Vocal tract and articulators can produce aperiodic complex sounds unvoiced consonant speech sounds these can be transient or continuous depending on how much breath you take Vocal tract is our personal acoustic resonator that is variable the size and shape of the cavities can be changed causing the resulting sound to be different Resonance: the acoustic response of air and tissue within the oral, nasal, and pharyngeal cavities to the sound source (larynx) REMEMBER large acoustic resonators= lower frequencies small acoustic resonators= higher frequencies Vowels, diphthongs, nasals all result from filtering the complex periodic wave produced at the level of the vocal folds through the vocal tract which can vary its size and configuration and therefore change the resulting frequency of each sound Vowels: relatively open, unobstructed, voiced sound this is why children learn them first if someone is distorting vowels it is probably a neurological problem Fig. 5.13 Source function complex periodic sound generated by the vibrating vocal folds all of the harmonics decrease in intensity as frequency increases why F0 is what is heard even though sound might be produced f0= 100Hz all the way to f30= 3000Hz Transfer Function the resulting complex periodic sounds from the vibrating vocal folds resonance Output combination of frequencies generated at the level of the vocal folds and the resonance combination of all the vocal fold frequencies and the resonating frequencies because both are occurring at the same time The source function + transfer function = output Stevens & House Model of Vowel Production (Basically the vowel quadrilateral)
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always shown with the larynx to lips in cross section based on the location of the main tongue constriction imagine the vocal tract as a single tube open at one end and closed at the other (acoustic resonator) Spectrogram {REFER TO HANDOUTS} The darker the lines the louder the frequencies
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Articulation and Resonance - Articulation and Resonance...

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