Using the FletcherMunson curves of equal loudness determine

Using the Fletcher-Munson curves of equal loudness, determine the loudness level in phons of each of the following tones. Remember that the horizontal axis is marked as a logarithmic scale. The divisions between 100 and the far left represent 90, 80, 70, 60, 50, 40, 30, and 20. The divisions between 100 and 1000 represent 200, 300, 400, 500, 600, 700, 800, and 900.

A 48dB tone at a frequency of 10kHz
A 95dB tone at a frequency of 50Hz
A 46dB tone at a frequency of 100Hz
A 70dB tone at a frequency of 1000Hz

options start at 10 and go up by 10 all the way to 120 Please help!

Equal loudness in phons 120 120 100 2 80 60 D 40 20 100 1000 10,000 Frequency (Hz)

Solution

A 48dB tone at a frequency of 10kHz - 40 phons

A 95dB tone at a frequency of 50Hz - 80 phons

A 46dB tone at a frequency of 100Hz - 30 phons

A 70dB tone at a frequency of 1000Hz - 70 phons