A sound level meter reads 85 dB (A) as a result of a point noise source located 60 m away. Using a quick and simple method, estimate what the meter would read if 7 additional identical point noise sources were introduced at the same

distance from the meter.

 If a sound level meter were held 35 m from the original single-point noise source in (b), and there was no reflection or attenuation (other than that due to distance and wave divergence), estimate the reading on the meter.