Classical absorption of sound in air at

PHYSICS · Multi-part · Fermi University Physics · Oscillations, Waves & Acoustics · Acoustics of fluids: generation, propagation and attenuation · Acoustics of fluids: generation, propagation and attenuation

Signal Speeds in Fluids, Ch Sound in a moving, absorbing fluid: sources, refraction and loss

Problem

20^\circ\mathrm{C}

, including the rotational bulk viscosity, is

0.16\,\mathrm{dB\,km^{-1}}

1\,\mathrm{kHz}

. Using the fact that the classical absorption coefficient

\alpha

scales as

\omega^2

, find the classical absorption in air at ((a))

2\,\mathrm{kHz}

and ((b))

500\,\mathrm{Hz}

Browse the problem library