SWEET VOICE -
You may have noticed that the voice of women is generally sweeter than that of men. Even boys have a feminine voice till the age of eleven or twelve years. But later it starts becoming deeper. the voice of girls, however, does not change much with age.
Normally, the age between eleven to thirteen years is known as the puberty age. During this period, some of our glands produce sex hormones. These hormones bring many changes in the bodies of boys and girls. In boys, they are responsible for the growth and appearance of the hair under arms, auxiliary hair, pubic hair and facial hair. The voice of the boys starts becoming deeper. Their bodies produce a hormone called 'testosterone' which is mainly responsible for changing the length and thickness of the vocal cords. This also affects the larynx. As a result, a man's larynx becomes larger than that of a woman. men have vocal cords longer than those in women. Due to this, the frequency or pitch of man's voice becomes lower than woman's and hence the male voice becomes deeper than that of a female.
Though this hormone is not produced in the girls, yet a slight change occurs mainly due to the further growth of their throat, mouth, nose, and upper jaw.
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