A nearby lawnmower has an intensity of about 10-2 W/m2.

What is this in dB?

If the mower is 2m away, how much sound power is it producing? (in Watts)

Using the hearing chart (the one with phone lines), compare the dB of the mower at 102, 103, and 104 Hz. At which of these three frequencies is the mower perceived as loudest?

d. A dog next door to the mower is barking with an intensity of 10-4 W/m2. How much more or less (in decibels) is this than the mower?

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