Air column

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The amount of air contained in a vertical , usually tubular piston or other vessel is referred to as the air column .

In the earth's atmosphere , the column of air is also the amount of air that extends vertically in the direction of space from any point on the earth's surface . It exerts a hydrostatic pressure , the air pressure , on all objects in it (also called "disturbances") or on the ground. The change in pressure with altitude above the ground is approximately described by the barometric altitude formula ; the atmospheric temperature gradient , d. H. the change in temperature with height above the ground is described by the dry adiabatic or wet adiabatic temperature gradient .

With wind instruments , the column of air inside the body is the actual sound generator. It is made to vibrate by the instrument mouthpiece , and the pitch produced depends on its length, thickness and air pressure .

Individual evidence

  1. ^ Lecture attempts : Richardson pipe. In: pi1.physik.uni-stuttgart.de. Archived from the original on November 18, 2008 ; accessed on February 27, 2014 .
  2. ↑ column of air. Spelling, meaning, definition. In: duden.de. Retrieved February 27, 2014 .
  3. ↑ wind instruments. In: regensburg.de. Retrieved February 27, 2014 .