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Three noise sources produce intensity levels of 7 5 d B , 7 9 d B , and 8 9 d B , when acting
Three noise sources produce intensity levels of and when acting separately. When the sources act together, the resultant intensity is the sum of the individual intensities.
Find the sound intensity level in decibels when the three sources act at the same time.
Discuss the effectiveness of eliminating the two less intense sources in reducing the intensity level of the noise.
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