ORGANS OF SPEECH & AIRSTREAM MECHANISM
HOW ARE SOUNDS PRODUCED?
- Speech sounds are produced by a moving the column of air in a resonating chamber just like a musical instrument.
- Different sounds are produced by varying the speed of the column of air, the size and shape of the resonating chamber, and by introducing various kinds of vibrations into the column.
- This is why different musical instruments sound different and thats also why different people sound different when they talk.
THE SOUNDS PRODUCING SYSTEM :
o lungs : set air in motion
o trachea : windpipe
o larynx : the sound source (where the
o vocal cords are)
o pharynx
o oral cavity
o nasal cavity
- Air goes from the lungs through the windpipe (trachea) and into the larynx → the air must pass between two small muscular folds, i.e. the VOCAL CORDS.
- The air passages above the larynx are known as the VOCAL TRACT. The VOCAL TRACT :ORAL TRACT (within the mouth) NASAL TRACT (within the nose)