What is the minimum pressure required to vibrate the vocal cords and produce a quality voice?
a. 1 cm H2O
b. 2 cm H2O
c. 3 cm H2O
d. 4 cm H2O
ANS: B
For speech to occur, tracheal pressures of approximately 2 cm H2O are required to vibrate the vocal cords and produce a quality voice.
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