How is is made, changed or heard?
What is Sound?
How is Sound Made?
If we turn the volume up, the cone will vibrate more to create a louder sound. It will vibrate more frequently if the sound is higher.
How is Sound Changed
There is a flat line when there is no sound. The air molecule aren't vibrating.
The trace goes up and down. It has a small amplitude.
The trace goes up and down much more. The amplitude is much greater.
The waves are very close together. The molecules are vibrating more times every second.
The waves a far apart. The sound has a lower frequency.
How is Sound Heard
How Sound Travels
Unwanted sounds is called noise. Loud sound can damage you ear and it could make you deaf.
- Cambridge Checkpoint Science Workbook