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SPEECH SIGNALS.pptx
- 1. Speech Signals La Ode Muhammad Nur Rahim G2Q121019
- 2. Table of contents What is speech signal? 1 4 2 Linguistic structure of speech Speech Production 3 Acoustic properties
- 3. What is speech signal? 1
- 4. What is Speech? • Speech is our primary mode of communication • The communication or expression of thoughts in spoken words • Speech is the ability to express thoughts and emotions through vocal sounds
- 5. Speech signals are sound signals, defined as pressure variations travelling through the air. These variations in pressure can be described as waves (sound waves) What is Speech Signals?
- 6. A speech signal carries linguistic information for the sharing of information and ideas. Process Created at the Vocal cords, Travels through the Vocal tract, and Produced at speakers mouth And gets to the listeners ear as a pressure wave. What is Speech Signals?
- 8. The vocal folds The vocal folds, also known as vocal cords, are located in the throat and oscillate to produce sounds. Speech Production Vocal folds as seen from above Vocal folds as seen from front/back
- 9. The vocal tract The vocal tract, including the larynx, pharynx and oral cavities, have a great effect on the timbre of the sound. Speech Production
- 10. Acoustic properties of Speech Signals 3
- 11. The resonance of the vocal tract, especially the two lowest resonances, known as the formants F1 and F2 (see figure below). Acoustic properties of Speech Signals
- 12. The fundamental frequency of a speech signal or its absence carries a lot of information. Acoustic properties of Speech Signals
- 13. Signal amplitude or intensity over time is another important characteristic and in its most crude form can be the difference between speech and silence Acoustic properties of Speech Signals
- 15. Besides their acoustic characteristics, speech signals can be characterized in terms of their linguistic structure.
- 16. Linguistic structure of speech Elementary units of spoken language Phones Syllables Words Utterances Morphological units Distinct of speech sound sequences of sounds minimum meaningful unit of language Smallest unit of speech Word formation
- 17. Linguistic structure of speech Prosody (suprasegmental properties of speech) Intonation Stress Rhythm a matter of variation in the pitch of the voice emphasis given to one syllable or word sense of recurrence in the speech