Deflection

Sound quantities

Sound deflection ${\displaystyle \xi }$ Sound pressure ${\displaystyle p}$ Sound pressure level ${\displaystyle L_{p}}$ Sound energy density ${\displaystyle E}$ Sound energy ${\displaystyle W}$ Sound flow ${\displaystyle q}$ Speed ​​of sound ${\displaystyle c_{\text{S}}}$ Acoustic impedance ${\displaystyle Z}$ Sound intensity ${\displaystyle I}$ Sound power ${\displaystyle P_{\text{ak}}}$ Speed ​​of sound ${\displaystyle v}$ Fast sound amplitude ${\displaystyle v}$ Sound radiation pressure

The momentary distance  x of a point  P (on a curve or a straight line) from its rest position is referred to as deflection or elongation of an oscillation .

The greatest deflection is called the amplitude and is indicated by the mathematical symbol as the maximum value. ${\displaystyle {\hat {x}}}$

For example, the amplitude of the sound displacement  ξ  (Greek Xi ) of a harmonic oscillation is :

${\displaystyle {\hat {\xi }}={\frac {\hat {v}}{\omega }}={\frac {\hat {p}}{Z\cdot \omega }}={\frac {\hat {a}}{\omega ^{2}}}}$

With

• Speed ​​of sound v
• Angular frequency ω = 2 · π · f
  • Frequency f
• Sound pressure p
• Characteristic acoustic impedance Z
• Sound acceleration a .

literature

• Horst Stöcker : Pocket book of physics. 4th corrected edition. Verlag Harry Deutsch, Frankfurt am Main et al. 2000, ISBN 3-8171-1628-4 .
• Horst Kuchling: Pocket book of physics. 4th edition. Verlag Harry Deutsch, Frankfurt am Main et al. 1982, ISBN 3-87144-097-3 .