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Mini-Quiz: How Obstacles Affect Sound Waves

by Ron Kurtus (revised 14 May 2007)

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



1. Why would less sound be reflected off a rough or porous surface?

The sound may be reflected multiple times by the porous surface

Rough surfaces may distort the sound waves

Porous materials usually are not very flat

2. If a material absorbed much of entering sound, what would happen to its temperature?

Nothing since it is absorbing sound and not heat

The temperature would go down because the sound filters out all the heat

The temperature would rise since some sound energy is turned into heat energy

3. Why can you hear low frequencies better through a wall than high frequencies?

Low frequencies are absorbed more in the wall than high frequencies

Low frequencies start off being louder

Low frequencies are not absorbed as much as high frequencies

If you got all three correct, you are on your way to becoming a Champion in Physics. 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

Atmospheric Sound Absorption Calculator - Calculate how much sound is absorbed in atmosphere under different conditions

Reflection of Sound - From Non-destructive Testing (NDT) Resource Center

Physics Resources

Books

Top-rated books on Sound Waves


Questions and comments

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Mini-Quiz: How Obstacles Affect Sound Waves




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