//Example 17.6
//This question is beyond the scope of computation.
//Refer the plot of intensity level versus frequency to obtain below answers (Figure 17.36)
//a.Loudness = 75 phons
//b.Intensity level = 67 dB
//c.Intensity level = 63 dB
//Openstax - College Physics
//Download for free at http://cnx.org/content/col11406/latest