Passage VII
The human threshold of hearing is the minimum intensity at each sound frequency required for a sound to be heard by humans. The human threshold of pain is the maximum intensity at each sound frequency that humans can tolerate without pain.
The figure below displays, for sounds in water and in air, the human thresholds of hearing and of pain. The figure also shows S, the percent increase in air density and water density that accompanies the compression of air and water by sound waves of given intensities. Sound intensities are given in decibels (db) and frequencies are given in hertz [(Hz); 1 Hz = 1 cycle/sec].
39. A student hypothesized that sounds of any intensity at a frequency of 105 Hz would be painful for humans to hear. Do the data in the figure support this hypothesis?
Your Answer is
Correct Answer is C
Explanation
When the ordinate in the figure is 105 Hz, the threshold of hearing and threshold of pain curves do not extend to this area, that is, people cannot hear the sound of this frequency, so It won't feel harsh either