Aims & Learning Objectives:
To introduce quantitative aspects of noise control and to give an appreciation of some of the problems involved. To acquaint the student with more advanced aspects of vibration.
After taking this unit the student should be able to:
Calculate sound pressure level given relevant power and material data. Estimate the reduction in sound pressure level that could be achieved by the use of a barrier or enclosure. Convert equations of motion into principal coordinates. Describe how to measure normal modes of structures. Apply harmonic balance to solve Rayleighs equation to obtain limit cycle solutions and also to solve Duffings equation and thus to explain jump phenomena.
Content:
Response of the ear, noise exposure, code of practice; noise isolation and absorption; barriers and enclosures; modal analysis and testing; nonlinearity.
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