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The Loudness of Sound Decreases as the Distance from the Source

Question 12

Multiple Choice

The loudness of sound decreases as the distance from the source increases. Doubling the distance from a sound multiplies the relative intensity of the sound by one-fourth. When the sound of a speaker is recorded as 80 decibels at 10 feet, what is the decibel reading if four identical speakers are added at 20 feet?


A) 83 decibels
B) 84 decibels
C) 92 decibels
D) 93 decibels

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