The Power of Speech: Respiratory System and Vocal Cords
Learn how the respiratory system, particularly the lungs, generates the power to push air for speech sounds. Discover the process of inhalation and exhalation, vocal cord vibrations, and articulation to shape speech sounds. Explore the role of vocal cords in controlling airflow and producing sounds in speech.
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Presentation Transcript
- The basic source of power that pushes air in motion in all speech sounds is the respiratory system respiratory system, specifically the lungs.
How it Works ? The process begins when we inhale air into our lungs. This is known as inhalation The air in our lungs is then pushed out through the vocal tract when we speak. This is known as exhalation exhalation or expiration expiration. The pressure created by the exhaled air causes the vocal folds in the larynx (voice box) to vibrate, producing sound. The sound is then shaped into specific speech sounds by the articulatory actions of the vocal tract (e.g., movements of the tongue, lips, and other speech organs). inhalation or inspiration.
1- Inhalation: Air is inhaled into the lungs 2-Exhalation: Air is pushed out from the lungs 3-Vibration: Vocal folds vibrate to produce sound 4-Articulation: Sound is shaped into speech sounds In summary, the power to push air in motion in all speech sounds comes from the respiratory system, with the lungs playing a crucial role in this process.
Vocal Cords Vocal cords are also called vocal folds. Vocal cords are two small bands of elastic tissue which can be thought of as two flat strips of rubber. Vocal cords are lying opposite each other across the air passage.
The inner edge of the vocal cords can be moved towards each other so that they cover the top of the wind pipe can be drawn apart. This is their normal position when we breathe quietly in and out. The space between the vocal cords is called the glottis.
States of the Glottis When they are brought together tightly no air passes through them and if the lungs are pushing air from below this air is compressed. If the vocal cords are opened suddenly the compressed air bursts out with a sort of a coughing noise. 1. Try this: Open your mouth wide Hold your breath Imagine you are picking up a heavy weight, holding it for two seconds, then dropping it quickly and suddenly let your breath out. The holding back of the compressed air followed by a sudden released is called the glottal stop.
States of the Glottis 2. If the vocal cords are brought together quiet gently, the air from the lungs will be able to force them apart for a moment, but then they will return to the closed position. 3. The vocal cords are drawn apart that the air can pass out freely between them and there is no vibration. The result of this state is voiceless sounds.
Pharynx is the space behind the tongue and reaching up towards the nasal cavity.
What is the Importance of the Palate?
The Palate The Palate The palate forms the roof of the mouth that separates the mouth cavity from the nose. Parts of the Palate The soft palate (velum) should have holes forming that function during speech sounds to separate the mouth cavity from the nose. 1. The hard palate is a thin horizontal bony plate of the skull located in the roof of the mouth. The interaction of the sounds between the tongue and the hard palate is essential in the formation of /s/ and /d/ 2. The alveolar ridge is a hard ridge behind the upper front teeth. It is between the roof of the mouth and the upper teeth. 3.
The Teeth The Teeth The teeth are small whitish structures found in the jaw. The teeth are responsible for creating sounds, such as /f/, /v/, etc. The Lips The lips can take different positions. The can be brought firmly together so that they completely block the mouth as when producing sounds like, /p/, /b/ and /m/. 1. The lower lip can be drawn inwards and slightly upwards to touch the upper front teeth as in the sounds /f/ and /v/. 2. They can be kept apart either flat or with different amount of rounding, as in producing different kinds of vowels. 3.
The Tongue The Tongue The tongue is the most important organ of speech because it has the greatest variety of movement. Parts of the Tongue 1. The tip of the tongue. 2. The front of the tongue. 3. The back of the tongue. 4. The blade.
The back of the tongue lies under the soft palate. 1. The front of the tongue lies under the hard palate. 2. The tip and the blade of the tongue lie under alveolar ridge. 3. The tip and the blade of the tongue are mobile. 1. The can touch the whole of the lips, the teeth, the alveolar ridge and the hard palate. 2. The front can be flat on the bottom of the mouth it can be raised to touch the hard palate. 3.
