The vocal cords are located on the male throat. In women, who do not have a throat, they are located in a similar position (where they feel a little stiff). These vocal cords produce voice by shaking, similar to the sound of a piece of paper being held to the mouth.
The vocal cords are normally hidden and only come out into the airway in the throat when it is necessary to produce voice. For this reason, voice is not normally produced when breathing through the mouth.
In addition, in order to speak, we must not only make sounds, but also form the sounds into words, such as "ah" and "ee. The mouth and tongue are important to make the voice into words. The vocal cords are turned into words by moving the tongue and the entire mouth in various ways. When you actually pronounce the words "ah," "i," "u," "e," and "o," you will notice that the shapes of the mouth and tongue are different for each sound.

The human voice comes from the vocal cords, which are controlled by the brain. The motor speech center of the brain is responsible for this, and if this part of the brain is damaged, the person may be able to hear and understand words, but will not be able to speak.