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5. By how many decibels do you reduce the sound intensity level due to a source...

5. By how many decibels do you reduce the sound intensity level due to a source of sound if you double your distance from it? Assume that the waves expand spherically.
dB

6. The sound in a classroom is 63000 times as intense as the minimum threshold of hearing. What is the intensity level of this sound in decibels?
dB

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S decibel Level 121피 or L-Lmin 48 de

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