A noisy machine in a factory produces a decibel rating of 78 dB. How many identical machines could you add to the factory without exceeding the 90 dB limit?
Added by Debra A.
Step 1
This means that an increase of 10 decibels corresponds to a tenfold increase in sound intensity. The formula to calculate the total decibel level of multiple identical sound sources is: Total dB = dB of one source + 10 * log10(number of sources) We know that Show more…
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