SOUND Energy.

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Presentation transcript:

SOUND Energy

If there are no particles to vibrate, there is no sound! What is SOUND Energy? Sound is a wave of vibrations Sound travels through a material by bumping into other particles and making them vibrate If there are no particles to vibrate, there is no sound!

Waves The number of cycles that pass by a point each second is the waves frequency FREQUENCY – how fast particles are vibrating The greater the frequency the higher the pitch The lower the frequency the lower the pitch

LOUD or SOFT The more energy a sound wave has the louder it will be A louder sound vibrates more than a softer sound How loud or soft a sound is can be measured in units called DECIBELS

How does SOUND travel? Sound can travel through solids liquids and gases Sound can do three different things Bounce back off an object (ECHO) Be absorbed into a material or object Pass through a material  ECHO