Hz are not heard by the human ear. Many animals have a wider range of hearing and therefore can pick up much higher sounds than humans. The tone of a sound is caused by the type of vibration making it. The quality of sound depends on the material from which the sound producing instrument is made and the way it is played. We hear sounds with our ears.
Vibrations move rapidly through the air towards our ears and make part of the human ear vibrate.
Sound is heard because energy is transferred from the vibrating object to the ear. Very small sounds can be heard with special instruments. Everyday, people are bombarded with noise. Research shows that people in Africa have a greater range of hearing than North Americans because they have sustained less environmental damage to their ears. Discuss the parts of the ear and their function.