# Fast sound amplitude

The sound velocity amplitude is the maximum value of the sound velocity . Since this is an alternating quantity, it is usually specified as an effective value or as a peak value. If the particle movement takes place in a transmission medium (mostly air), the following relationship applies between the amplitude of the sound velocity and the deflection amplitude (amplitude or sound amplitude).

${\ displaystyle v = {2 \ cdot \ pi \ cdot f \ cdot \ xi} = {\ omega \ cdot \ xi} \,}$

The unit of sound velocity is m / s.

Where:

Fast sound amplitude ${\ displaystyle v \,}$
Frequency in Hz${\ displaystyle f \,}$
Deflection of air particles ( sound deflection )${\ displaystyle \ xi \,}$
${\ displaystyle \ xi \,}$ is the Greek letter xi, pronounced ksi
Angular frequency = 2 · ·${\ displaystyle \ omega \,}$${\ displaystyle \ pi \,}$${\ displaystyle f \,}$