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Details of Grant 

EPSRC Reference: GR/L15326/01
Title: THE PREDICTION OF NOISE ARISING FROM MOVING DIRECTIONAL SOURCES IN A COMPLEX OUTDOOR ENVIRONMENT
Principal Investigator: Attenborough, Professor K
Other Investigators:
Researcher Co-Investigators:
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Department: Unknown
Organisation: The Open University
Scheme: Standard Research (Pre-FEC)
Starts: 01 January 1997 Ends: 30 June 1999 Value (£): 105,557
EPSRC Research Topic Classifications:
Transport Ops & Management
EPSRC Industrial Sector Classifications:
No relevance to Underpinning Sectors
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Summary on Grant Application Form
Much of the previous publications have concentrated on the sound field due to a stationary monopole source above an absorbing ground. However, transportation noise sources are neither stationary nor monopole in nature. The current available theory is unlikely to be adequate for a source travelling at a non-negligible Mach number such as a motor vehicle travelling at high speed, a high speed train, and advancing helicopter or aircraft approaching an airport during landing (or taking-off). Here, in this context, we see that there is an urgent need to redress the balance and to investigate the sound field for a moving directional source above an absorbing surface in a complex outdoor environment. In addition, there is also a need to develop an efficient numerical scheme to compute the sound field in more realistic sound speed profiles over a mixed impedance ground and over a barrier.
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