The Acoustic Research Group has expertise in noise and vibration control in a wide variety of applications including buildings, machinery and transport.
The Acoustic Research Group has expertise in noise and vibration control in a wide variety of applications including buildings, machinery and transport. The acoustic facilities have been continuously developed and currently consist of a reverberation room, transmission loss suite, anechoic room, duct noise test rig, low noise wind tunnel, listening room (which complies with AS/NZS1270) and an automotive silencer test facility. These facilities are supported by state of the art Bruel and Kjaer multi channel Pulse systems, hand held sound level analysers, microphones, sound intensity analysers, noise sources and calibration equipment. An extensive range of software is also available for computational analysis including the BEM/FEM packages Sysnoise, Comsol and ANSYS, environmental modelling software SoundPlan and sound absorption and sound transmission prediction software. The group has capability in vibration measurement, modelling and analysis and has a range of shakers and accelerometers complemented by prediction software. In the last 10 years the group has been heavily involved in product development programmes for NZ industry, supported by Technology NZ.
Current research includes passive and active materials for noise and vibration control including the development of sound absorption technology, prediction of sound transmission loss as well as materials for vibration damping. Research projects are also in progress in the areas of sound transmission through building elements such as roofs, doors and walls, traffic noise (noise barriers and tyre/road noise), room acoustics, aeroacoustics (fan noise) and machinery noise control. Current research includes identification and analysis of noise generation mechanisms and the attenuation of the resulting noise particularly in relation to occupational health.
Past successes include an award–winning roof rack system: http://www.comsdev.canterbury.ac.nz/news/2009/090219a.shtml, low noise fans: http://www.comsdev.canterbury.ac.nz/news/2009/090218a.shtml, sound absorption products, products to enhance the sound transmission loss of double leaf wall systems for a range of clients and attenuation of various items of mechanical equipment including automotive exhaust silencers and wind turbines.