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Normal conversation is about 1 microwatt per square meter (104-6 W/m*2). What is this in decibels? Answer: Hearing protection has to be worn above 85dB.

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Normal conversation is about 1 microwatt per square meter (104-6 W/m*2). What is this in decibels? Answer: Hearing protection has to be worn above 85dB. What intensity does 90dB correspond to? Give your answer to ONE sig fig. in Watts per square metre. Do NOT include units, just the number

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