20 HTZ TO 20,000 HTZ - Twenty "Hertz" (cycles per second) to 20,000 Hertz is the perceptible range of human hearing. Human hearing does not support hearing above 20,000 hertz. Human hearing below 20 hertz refers to hearing "rhythm".
A text summary of the clickable map above, meant for web-crawlers and other automatic tools:
20 htz to 20,000 htz is range of human hearing
20 htz to 20,000 htz range of humans hearing sound
