A Certain Glass Window Reduces the Intensity Level of the Sound

question 65

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)3.2 × 10^-3
• B)2.2 × 10^-2
• C)5.6 × 10^-2
• D)1.0 × 10^-1
• E)1.5 × 10^-1