Sound Vibrations: How We Hear

Understanding how sounds are made Exploring vibrations and hearing Year 5 Science

What Makes Sound?

Think about the sounds around you right now What do you think creates these sounds? Share your ideas with a partner

Everything That Makes Sound Vibrates

Vibration means moving back and forth very quickly When something vibrates, it pushes air around it These pushes travel through the air as sound waves No vibration = No sound!

Let's Feel Vibrations!

Place your hand on your throat and hum Feel the vibrations in your voice box Try humming high and low notes What differences do you notice?

Examples of Vibrating Objects

{"left":"Drum skin moves up and down when hit\nGuitar strings shake back and forth\nSpeaker cones push air in and out","right":"Your vocal cords vibrate when you talk\nBells swing and ring\nWhistles have air vibrating inside"}

How Sound Travels to Your Ears

Your Amazing Ears

Your outer ear catches sound waves Sound waves make your eardrum vibrate Tiny bones in your ear pass on the vibrations Your brain turns vibrations into sounds you recognize

Sound Investigation

Work in pairs with different objects Predict: Will this object make sound when used? Test: Try to make it vibrate and create sound Record: What happened? Did it vibrate?

Remember This!

"All sounds are made when something vibrates. No vibration means no sound!"

What We've Learned

Sounds are made when objects vibrate Vibrations push air and create sound waves Sound waves travel through air to our ears Our ears detect vibrations and send signals to our brain We can feel vibrations in our own voice box