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What are sounds made from?
Vibrations
Sing your favourite song
.....
Use something from around the room to make an interesting sound
........
What creates the sound on a guitar?
The Strings
How do pan pipes make a sound?
The air vibrates when blown
How does our voice make a sound?
Our vocal chords vibrate
Which molecules vibrate to create sound?
Air Molecules
In a vacuum can you make sound?
No because there are no air molecules
More sound waves create a higher or lower frequency?
higher
Less sound waves create a higher or lower frequency?
lower
The Human ear can hear sounds from?
20hz - 20,000hz
Frequency is measured in.....
Pitch
Loudness is measured in
Decibels Db
Volume =
Loudness
Ultrasound is a frequency....
Above 20,000 hz
What is frequency measured in?
Herts / Hz
