Properties of Sound

Question 1

Which of these can harm the human ear?

Revolt · Accepted Answer

fireworks

Question 2

Question 2

Revolt · Accepted Answer

81141

Question 3

Order these sounds from loudest (1) to softest (4). airplane: whisper: crowd at sporting event: rainfall:

Revolt · Accepted Answer

1; Selection 1: 1; Selection 2: 4; Selection 3: 2; Selection 4: 3

Question 4

Question 4

Revolt · Accepted Answer

4

Question 5

Question 5

Revolt · Accepted Answer

2

Question 6

Question 6

Revolt · Accepted Answer

3

Question 7

Order the sounds made by these sources from highest to lowest pitch.

Revolt · Accepted Answer

motorcycle, telephone, piano, lawn mower

Question 8

Which instrument, a cello or a violin, produces a higher-pitched sound? Explain your answer.

Revolt · Accepted Answer

The violin produces a higher-pitched sound than the cello. This is because the violin is smaller and has shorter, thinner strings than a cello. Shorter and thinner strings vibrate at a higher frequency, which results in a higher pitch.

Question 9

Would these two waves produce a standing wave?

Revolt · Accepted Answer

No, because the waves do not have the same amplitude.

Question 10

What is the quality of the sound of an ambulance’s siren when it moves toward a stationary hearer? What is the quality of the sound of an ambulance’s siren when it moves away from a stationary hearer?

Revolt · Accepted Answer

It is high-pitched.; Selection 1: It is high-pitched.; Selection 2: It is low-pitched.

Properties of Sound Answers

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