A Certain Glass Window Reduces the Intensity Level of the Sound

question 10

Multiple Choice

A certain glass window reduces the intensity level of the sound from 72 dB to 47 dB. By what factor is the acoustic power reduced by this glass window?

• A) \(1.5 \times 10 ^ { - 1 }\)
• B) \(5.6 \times 10 ^ { - 2 }\)
• C) \(3.2 \times 10 ^ { - 3 }\)
• D) \(1.0 \times 10 ^ { - 1 }\)
• E) \(2.2 \times 10 ^ { - 2 }\)

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