audio
Audio (lat. I hear, of audire hear) is used in the linguistic usage as a component of words, which with the term hearing or with the audio engineering to do to have, e.g. with audio plant, noise meter, auditory.
Audio refers to the human audio range, which covers the frequency range of 18 cycles per second (critical flicker frequency) to 20 kHz. This range is subject to the human hearing characteristic and is strongly age-dependent in the top. The audible upper Frequenzgrenze can at the age up to 1