The source-filter theory describes speech production as a two stage process involving the generation of a sound source, with its own spectral shape and spectral fine structure, which is then shaped or filtered by the resonant properties of the vocal tract.Click to see full answer. Just so, what is the source in the source filter theory of vowel production?The Source Filter Theory. The “source” in the source filter theory is the larynx and the filter is the vocal tract. The larygneal source is the first part of speech production. The vocal tract is a resonator that will modify the sound source. what is the primary source of acoustic energy in vowels? For vowel sounds, the source of sound is the regular vibration of the vocal folds in the larynx and the filter is the whole vocal tract tube between the larynx and the lips. Just so, what is the power source in the source filter model of speech? This Power-Source-Filter (PSF) model of voice production is a specialization of the Source-Filter model, widely used in speech pathology, speech analysis and speech synthesis, to singing. This model constitutes the central dogma of singing, the foundation for understanding how the human voice works.What is the acoustic theory of speech production?The Acoustic Theory of Speech Production. Acoustic speech output in humans and many nonhuman species is commonly considered to result from a combination of a source of sound energy (e.g. the larynx) modulated by a transfer (filter) function determined by the shape of the supralaryngeal vocal tract.