What is the length of vocal cords in a man?

Name the part which vibrates to produce sound in the following:

(a) Drums

(b) Sitar

(c) Flute

What brings the sound of a ringing telephone bell to our ears?

Out of a man and a woman:

(a) who has shorter vocal cords?

(b) who produces sound of higher pitch?

Give any four sources of sound in a market place.