1. Estimate the perceived loudness in phons of a 100 Hz sound that reads 40 dB on your decibel meter. Justify your answer by marking this point on the F-M diagram below. 2. Estimate what decibel level you need to play a 500 Hz sound at in order to sound 70 phone loud. Justify your answer by marking this point on the F-M diagram below. 3. Which sounds louder, a 100 Hz sound at 60 dB or a 500 Hz ground at 60 dB? Or are they equally loud? Explain how you made your decision. U ' 1 mum Intensity lave-l (dB) 7 (Mill