.Three grinding machines operate simultaneously and each produce a noise level according to the following table. Determi
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.Three grinding machines operate simultaneously and each produce a noise level according to the following table. Determi
.Three grinding machines operate simultaneously and each produce a noise level according to the following table. Determine the combined noise level. Show all your calculations. Machine # Noise level (dBA) 1 89 2 95 3 99 L=410* log10 -fuo**.]
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