SOUND

Bertleja, Academic Content Writer for Physics at Edumarz

• Sound is produced when objects vibrate.

• Vibrations are rapid backward and forward motion of objects.

• Vibrations propagate through a medium such as air to our ears, where they are interpreted as sound by the brain.

• Three things vibrate when a sound is produced:

1. The source object

2. Molecules in the medium

3. Eardrum of the listener

When an object vibrates, it       produces sound. The sound waves travel through a medium which causes the molecules in the medium to vibrate. When the sound wave reaches the outer ear, the eardrum  vibrates.

• Examples of vibrating sources of sound:

1. When we pluck any stringed instrument, it vibrates and produces sound.

2. When a flute is blown, the air column vibrates within it and produces sound.

3. When a tightly stretched elastic band is plucked, it vibrates and produces sound.

4. The rapid wingbeats of humming bees create vibrations that are heard as  buzzes.