Some taxes are inadvertently hidden, but others are consciously designed that way to disguise the cost of government. Itâs easy to see why: the total U.S. tax burden is equal to 56 percent of annual personal consumption spending.
Thus, the volume is proportional to the amplitude of the sound wave. The frequency of a sound wave is perceived as pitch. Humans can detect pitches within the acoustic range of 20 to 20,000 Hz, but we can't detect ultrasound or infrasound.
Hertz is a measure of frequency, in cycles per second. 1 person found this useful. Edit. Share to: Dave Woodruff. 28,650 Contributions. Passion, is the electrical trade. Downfall, is being a perfectionist. Results of the two; Priceless.