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2 cards from this section. Quick, good the night before a test.
What does it mean when we say sound needs a medium?
Think about how you hear sound in different environments.
Name one source of noise pollution.
Consider sounds that bother you in your daily life.
Sound can travel through which medium?
Consider how sound travels under water versus in the air.
True or False: Noise pollution is only related to music.
Think about other noise sources you hear daily.
A violin string vibrates at a frequency of 446 Hz. How many oscillations does it complete in 2 seconds?
Multiply the frequency by the time.
You are at a concert with music at 85 dB. How does exposure to sounds above 80 dB affect your hearing?
Refer to the loudness levels discussed in class.
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