lecture23 - The Human Voice. 1. The vocal organs I. Speech...

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The lungs serve as reservoir of air and a source energy In speaking, air is forced form the lungs through the larynx into the three main cavities: the pharynx, the nasal and the oral cavities Air exits through the nose and mouth Air can be inhaled and exhaled without much sound To produce speech sounds, the flow of air is interrupted by the vocal cords or by constrictions in the vocal tract (made by the tongue or lips) 1. The vocal organs The Human Voice. I. Speech production
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Larynx and focal folds (cords) Larynx with focal folds is the major source of sound in the vocal system Sound is generated by the rhythmic opening and closing of the vocal folds Open during inhalation, closed when holding one's breath, and vibrating for speech or singing (oscillating 440 times per second when singing A above middle C), the folds are controlled via the valgus nerve A person's voice pitch (fundamental frequency) is determined by the resonant frequency of the vocal folds. The fundamental frequency is influenced by the length, size, and tension of the vocal folds. In an adult male, this frequency averages about 125 Hz In an adult females around 210 Hz, In children the frequency is over 300 Hz. The male vocal folds are between 17.5 mm and 25 mm (0.75" to 1.0") in length The female vocal folds are between 12.5 mm and 17.5 mm (0.5" to 0.75") in length
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The vocal folds generate a sound rich in harmonics.
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lecture23 - The Human Voice. 1. The vocal organs I. Speech...

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