Question: Question 1 [30 points]: Two workers are using a tool to perform their job. The sound power of the tool is 0.0005 W. a. What

Question 1 [30 points]: Two workers are using a

Question 1 [30 points]: Two workers are using a tool to perform their job. The sound power of the tool is 0.0005 W. a. What is the sound power level of the tool in terms of dB? b. Why is the reference power level taken 1x10-12 Watt rather than 0? C. If two workers want to speak each other, what should be the power level their talk for a intelligible communication? (You need use signal-to-noise ratio.)

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