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The pitch of your voice is determined by the tension in your vocal cords, which can be adjusted by muscles in your larynx. When your vocal cords are stretched tighter, they vibrate faster and produce a higher pitch. Conversely, when they are more relaxed, they vibrate slower and produce a lower pitch.
A lower-pitched sound has a higher frequency than a high-pitched sound.
Overtone singing is the practice of producing more than one pitch at once. In reality, the lower pitch is produced by the vocal cords, and the higher pitch is produced by moving the tongue and lips to create different shapes inside the mouth.
At the upper end of the trachea is the larynx. Sounds are produced when air is forced past two ligaments - the vocal cords - that stretch across the larynx. The pitch and volume of the sound produced varies with the amount of tension on the vocal cords and on the amount of air being forced past them,.
some pitches are lower than others because of the friction of your vocal cords rubbing together in different ways hope this helps you X)
It can be controlled by many things, but here are at least three: Length of the vocal cords. Thickness of the vocal cords. And stress on the vocal cords. That of course, it is the human body. If your talking about, say, a guitar amp, it's controlled by the little nob that says 'pitch' on it. -- J
vocal cords
The human voice is produced by the vibration of vocal cords in the larynx. Vocal range varies among individuals due to differences in vocal cord length and tension. The pitch and volume of the voice can be modulated by adjusting the tension and size of the vocal cords.
When air from the lungs is passed over the vocal cords inside the larynx, they vibrate. This makes a sound. The vocal cords are tightened or relaxed to change their length. This changes the speed of vibration which alters the pitch. If only the larynx is involved, the sound comes out as a dull 'aaah' in varying pitch. No recognisable words can be formed without the use of the lips, teeth, tongue and palate. This is why people with serious facial injuries or with many teeth missing often have trouble speaking or being understood.
Speech sounds are produced in the larynx through the vibration of the vocal cords when air passes through them. The vibration creates sound waves that are then shaped into specific sounds by the movement of the articulators, such as the tongue, lips, and teeth. The pitch, volume, and quality of the sound are determined by the tension and length of the vocal cords.
In terms of frequency, human voices can go down to roughly 80 Hz (E2).
the lower the frequency the lower the pitch; higher pitch lower frequency