Course notes – these are essential and required.

Bies, D.A. and Hansen, C.H., Engineering Noise Control, 4th edition, Spon Press, London, (2009)

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Lectures supported by problem-solving tutorials developing material covered in lectures

The required time commitment from the beginning of semester to the end of the final exam is 40 hours attendance at lectures, 40 hours of self directed learning, 40 hours completing assignments and 40 hours of revising course material and preparing for the exam.

• wave equation and its application
• sound power, sound pressure, energy density and sound intensity
• plane and spherical waves
• sound pressure addition and subtraction
• noise reduction combination

• noise measurement instrumentation
• practical measurement procedures

• various measures to quantify noise
• hearing damage risk
• speech interference
• ambient noise specification
• occupational and environmental noise criteria
• psychoacoustics

• monopoles, dipoles and quadrupoles
• line sources
• coherent and incoherent plane sources
• directivity and reflection effects
• sound propagation outdoors; ground effects, air absorption, atmospheric turbulence and temperature gradient effects.

• radiation impedance and the radiation field of a sound source
• sound power measurements
• sound pressure measurements in the laboratory and in the field
• sound intensity measurements
• surface vibration measurements.

• low frequency analysis
• high frequency analysis
• reverberation time, reverberant and direct sound fields
• sound absorbers
• measurement of the room constant
• prediction of sound levels generated by interior sound sources
• flat and long rooms
• applications of sound absorption

• flow resistivity and its measurement
• sound propagation in porous media
• measurement and prediction of statistical sound absorption coefficients

• sound transmission loss, STC rating, single and double walls
• acoustic enclosure design
• acoustic barrier design
• pipe wrappings.

• ENC: engineering noise control software
• SoundPlan

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All assessment tasks are summative. There are 5 assignments, each worth 6% of the assessment and an open book exam worth 70%. All assignments are due by 5pm on the due date. Details of each task are tabulated below.

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Assignments are provided as part of the learning experience. Students are expected to enhance their knowledge and understanding of the subject matter through completing the assignments, so they are regarded as formative rather than summative. The assignments are marked and the results included in the final assessment to ensure that students actually do the assignments and take them seriously. Solutions are discussed in class and also provided on MyUni at the end of semester. Assignments are also used to help assess whether the required graduate attributes are being developed.

The laboratory classes are intended to provide students with some practical experience in using acoustic instrumentation as well as experience in report writing and communicating their results. Again, this assessment is intended to be formative and students receive written feedback on their work.

The examination is a summative assessment and is intended to assess the student’s knowledge and understanding of the course material and how it fits into the global engineering context.

Assignments must be submitted by the due date and via MyUni electronic assignment submission. All assignments must be accompanied by an assessment cover sheet available from the front office S116 or next to the assignment submission box. Late assignments will be penalised 10% per day. Extensions for assignments will only be given in exceptional circumstances and a case for this with supporting documentation can be made in writing after a lecture or via email to the lecturer who set the assignment. Assignments will be assessed and returned in 2 weeks of the due date. There will be no opportunities for re-submission of work of unacceptable standard.