MEC4444

Industrial noise and its control

(ENG)

L L Koss

6 points + 22 lecture hours plus 22 hours of tutorial and laboratory classes + First semester + Clayton, Malaysia + Prerequisites: MAT2901 + Prohibition: MEC4430

Synopsis: Fundamentals of sound and sound propagation, wave equation, Helmholtz equation, absorption, impedance and intensity, silencers. Transmission from one medium to another, applications and optimisation. Transmission through walls, mass law, coincidence and resonance. Sound transmission in the atmosphere, inverse square law, excess attenuation. Radiation of sound, directivity. Sound in enclosed spaces. Noise sources, noise reduction techniques, noise legislation and regulation, acceptable noise levels, hearing conservation, measurement and analysis of noise, design for low noise.

Assessment: Examinations: 70% + Assignments and tutorials: 25% + Laboratory: 5%