Which produces sound of a higher pitch : a drum or a whistle?

Name the characteristic of sound which enables us to distinguish between a man's voice and a woman's voice even without seeing them.

Arrange the following sounds in the order of increasing frequencies (keeping the sound of lowest frequency first) :

(i) Baby's voice

(ii) Man's voice

(iii) Woman's voice

Name the characteristic of sound which depends on:

(a) amplitude

(b) frequency.

Name the characteristic of sound which can distinguish between the 'notes' (musical sounds) played on a flute and a sitar (both the notes having the same pitch and loudness).