# Deflection

Sound quantities

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

## 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 .