On a whale-watching expedition, your underwater sound detector picks up a whale sound that has an intensity of 9.0 μW/m2 .
What is the intensity level β of this sound?
β = dB
If your detector tells you that you are 2.3 km from the whale, what is the power of the emitted signal?
How many whales, emitting sound at the same intensity 9.0 μW/m2 , are needed to produce an intensity level of 100 dB at your location?