Final answer:
The timbre of the human voice is influenced by gender, age, and vocal cord size.
Explanation:
Timbre of the human voice is determined by gender, age, and the size of the vocal cords. The human voice functions similar to a wind instrument, where the vocal cords vibrate, and the upper throat, mouth, and nose act as resonating chambers. Variations in tension and vocal cord size result in different pitches.
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