2. Overview of SpeechGeneration Speech is achieved by compression of the lung volume causing air flow which may be made audible if set into vibration by the activity of the larynx. This sound can then be made into speech by various modifications of the supralaryngeal vocal tract. Lungs provide the energy source - Respiration Vocal folds convert the energy into audible sound - Phonation Articulators transform the sound into intelligible speech - Articulation
3. An Overview of the Vocal Tract Robert Mannell An overview of the vocal tract showing structures that are important in speech sound production and speech articulation
5. Lung Structure and Function Expanding the thoracic cavity by expanding the rib cage (raising the ribs) and by lowering the diaphragm increases lung volume, decreases air pressure in the lungs and so air is drawn in from the from the outside to equalise pressure. Contracting the thoracic cavity by contracting the rib cage (lowering the ribs) and by raising the diaphragm decreases lung volume, increases air pressure in the lungs and so air is expelled from the lungs to equalise pressure with the outside air.
