Question

why voice produced by woman is shriller than man

Answer 1

voice produced by women is shriller than a man because the vocal cord of a man is 20 mm in length while that of women is 5mm in length which ultimately results in women's voice to be shriller
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Answer 2

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Women have shorter vocal cords which vibrate more quickly and produce a higher pitch, while in men the longer vocal cords vibrate with low frequencies giving them deeper voice. Thus, women have high-pitched or shriller voice as compared to men.