Phonetics and Phonology (ENG)
VU Lesson-37 USING PRAAT-II At the end of this section, the students will be able to • EXPLAIN the
Source-Filter model of speech • RECOGNIZE and ANALYSE features
such as fundamental frequency, harmonics and formants.
Topic-186: The Source-Filter Model of Speech We have been theoretically discussing about the source-filter theory in this course where we also touched upon the theoretical aspects such as the tube model (of the vocal tract) and the perturbation theory on the formant structure of vowels. Source-filter theory is particularly important to understand the basic components of speech sounds and the nature of the acoustic signals (it is the physics of speech sounds. It is, therefore, very crucial to understand the acoustic analysis of speech sounds particularly the vowels and vowel-like (sonorous sounds. The major goal of this lab is to understand and explore the basic acoustic components of (sonorous) speech sounds such as fundamental frequency, harmonics, and formants.
Basically, these components create the acoustic signals associated with speech – understanding them is crucial to understanding what we actually hear, when we hear speech sounds. The labs based on the source-filter theory are conducted in the next few sessions.
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