 Stokes's law of sound attenuation

Stokes's law of sound attenuation is a formula for the attenuation of sound in a Newtonian fluid, such as water or air, due to the fluid's viscosity.It states that the amplitude of a plane wave decreases exponentially with distance traveled, at a rate formula_1 given by
where formula_3 is the dynamic viscosity coefficient of the fluid, formula_4 is the sound's angular frequency, formula_5 is the fluid density, and formula_6 is the speed of sound in the medium