Question

Question 11
Which of the above two graphs (a) and (b) representing the human voice is likely to be the male voice? Give reason for your answer.

Answer 1

Graph (a) represents the male voice.
Usually the male voice has less pitch (or frequency) as compared to female voice.
We know frequency is the number of oscillations per unit time.
From the graph, (b) has higher frequency than (a). Therefore (b) has higher pitch than (a), hence (a) represents male voice.