f. The human voice is not just limited to the fundamental frequency and the other frequencies you calculated in part e. How could the human voice produce a wide range of different frequencies? g. At a distance of 1 ? , the intensity of sound waves from a person's voice in normal conversation is about 1.0 * 10 -6 W/? 2. What is the intensity level (in dB ) of these sound waves? The threshold of hearing is ? = 1.0 x 10 -12 W/? 2