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Physical unit
Unit name Rayl
Unit symbol ,
Physical quantity (s) Acoustic impedance
Formula symbol
system CGS system of units
In SI units
In CGS units
Named after Lord Rayleigh
Derived from Centimeter , gram , second

The Rayl (named after the English physicist John William Strutt, 3rd Baron Rayleigh ) is an outdated and illegal unit of the specific acoustic impedance . There are two different definitions that differ by an order of magnitude:

  1. In the CGS system of units :
  2. In the MKS unit system :

Individual evidence

  1. Holger Pettersson, Gustav Konrad von Schulthess, David J. Allison: The Encyclopaedia of Medical Imaging: Physics, techniques and procedures / volume editors, Gustav K. von Schulthess, Hans-Jørgen Smith . Informa Health Care, 1998, ISBN 82-91942-01-3 .
  2. ^ François Cardarelli: Encyclopaedia of scientific units, weights, and measures . Springer, 2003, ISBN 1-85233-682-X , pp. 555 ( limited preview in Google Book search).
  3. Often referred to as the original definition.
  4. ^ Z. Maekawa, Peter Lord: Environmental and architectural acoustics . Taylor & Francis, 1994, ISBN 0-419-15980-0 , pp. 366 .