Generally the voice of women is sweeter than that of men. Even boys have feminine voice till the age of eleven or twelve years. But later it starts becoming hoarse.
Normally, the age of eleven to thirteen years us known as the period of puberty. During this period some of glands produce certain hormones. These hormones bring many changes in the bodies of the boys produce a hormone called ‘testosterone’ which is mainly responsible for the change of voice.
Though this hormone is not produced in the girls, yet a slight change takes place in their voice also. The charge occurs mainly due to the further growth of their throat, mouth, nose and upper jaw. Due to all these factors women have a sweeter voice than men.