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Sound Energy

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What is sound?

• Sound is a form of energy.

• Sound travels in waves.

Sound occurs when..

• there is a back-and-forth movement called VIBRATION.

• You can see drums vibrate when you strike them or the strings on a guitar vibrate when you pluck them.

When strings are plucked on a guitar, the strings VIBRATE to create sound energy!

BIG vibrations...

• make LOUD sounds!

Small vibrations...

• make quiet sounds

S-L-O-W vibrations make...

• lower pitch because its a slower frequency.

FAST vibrations make...

• higher pitch because its a faster frequency.

What is pitch?

• Pitch is how HIGH or how LOW a sound is.

• Think of an opera singer hitting a high note in her song.

Sound must have MATTER to travel through.

• Think of the sound moving through the guitar string, or think of the rumble in your chest from a marching band during a parade.

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