Advanced acoustics
R J Alfredson
6 points * 22 lecture hours, 11 tutorial hours, 11 laboratory hours * Clayton
Wave equation and Helmholtz equation. Solutions in rectangular, cylindrical and spherical coordinates, Power, intensity and acoustic impedance. Advanced duct acoustics, convected wave equation, higher-order modes, solution of transcendental equations. Transmission of sound through several media. Mass law, wave coincidence, wall transmission loss. Radiation of sound, directivity, radiation ratio and impedance. Sound absorbing materials, design of silencers, Rayleigh model of absorption, other models.
Assessment
Examinations (2 hours): 85% * Tutorials: 10% * Laboratory: 5%
Recommended texts
Crighton D and others Modern methods in analytical acoustics Springer Verlag, 1992
Kinsler L Eand others Fundamentals of acoustics Wiley, 1982
Reynolds D D Engineering principles of acoustics: Noise and vibration control Allyn and Bacon