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Mini-Quiz: Creating Sound Waves

by Ron Kurtus (revised 18 March 2012)

Take this Mini-Quiz to check your understanding of the lesson material.



1. How does a loudspeaker create sound?

The speaker cone vibrates back-and-forth, creating compression waves in the air

The electricity that powers the speaker makes sounds when it crackles

Loudspeakers don't create sound; they detect sound

2. How do you make sounds from your vocal chords?

Vocal chords act like tiny loudspeakers, vibrating and forcing sound out your mouth

Air from your lungs passes over the vibrating vocal chords, making sound

It is a myth that your sound comes from vocal chords; it comes from your chest

3. What happens when you blow across the top of a bottle?

The top of the bottle gets cold, making a squeaking sound

Air starts to circulate and vibrate in the bottle, making a sound

You must blow into the bottle for anything to happen

If you got all three correct, you are on your way to becoming a Champion in Physics and sound. If you had problems, you had better look over the material again.


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Resources and references

Ron Kurtus' Credentials

The following resources provide information on this subject:

Websites

Loudspeaker Basics - From HyperPhysics

Physics Resources

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Top-rated books on Sound Waves


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Mini-Quiz: Creating Sound Waves




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