Question

Which charateristic of the sound help us to identify your friend by his voice while sitting with other in a dark?

Answer 1

Timbre and pitch are the characteristics of sound which help to identify the sound of different voice. Thus, because of difference in timbre and pitch of the sound wave I or any other can identify the voice of his friend sitting with others even in dark room.

Answer 2

☆$\red {HELLO\:DEAR}$☆

Quality of sound is that characteristic which helps us identify a particular person.

Sound produced by two persons may have the same pitch and loudness, but the quality of the two sounds will be different.

☆$\green {VISHU\:PANDAT}$☆

☆$\blue {FOLLOW\:ME}$☆