Using the graph of equal loudness contours determine the following

152 Chapter 6 The Human Ear and Voice Threshold of pain LL 120 120 phons 2 X 10 100 100 phons 10-2 2 80 80 phons 10-4 2 X 10- SIL (dB) 60 60 phons 10-6 Intensity (Watts/m) 2 X 10 -2 Pressure fluctuation (Pascals) 40 40 phons 10-8 2 X 10-3 20 20 phons 10 -10 2 X 10-4 Threshold of hearing 0 0 phons 10-12 2 X 10-5 20 50 100 200 500 1000 2000 5000 10,000 Frequency (Hz)