Sound Notes

• Sound is a vibration that is capable of being heard.

Sources of sound:

• Objects that produce sound are called sources of sound.
• E.g. Human beings, audio players, animals, birds, metal plate, tumbler, etc
• Sound is produced due to vibration of any object.
• A Vibration can be defined as a rapid back and forth movement of a body about a central position.

• The organ involved in the production of sound is larynx or voice box.
• It is situated in the neck at the upper end of the wind pipe.

• The sound produced is controlled by Vocal cords. These are thin stretched membranes across the voice box.
• Muscles are attached to the vocal cords which can vary tension in the vocal cords.
• Because of this human beings can produce variety of sounds.