TY - GEN
T1 - Prediction of radiated sound power from vibrating structures using the surface contribution method
AU - Peters, Herwig
AU - Kessissoglou, Nicole
AU - Lösche, Eric
AU - Marburg, Steffen
PY - 2013
Y1 - 2013
N2 - A common measure for near-field acoustic energy of a vibrating structure is the acoustic intensity, which usually has positive and negative values that correspond to energy sources and sinks on the surface of the radiating structure. Sound from source and sink areas partially cancel each other and only a fraction of the near-field acoustic energy reaches the far-field. In this paper, an alternative method to identify the surface areas of a vibrating structure that contribute to the radiated sound power is described. The surface contributions of the structure are based on the acoustic radiation modes and are computed for all boundaries of the acoustic domain. In contrast to the sound intensity, the surface contributions are always positive and no cancellation effects exist. To illustrate the method, the radiated sound power from a resonator is presented.
AB - A common measure for near-field acoustic energy of a vibrating structure is the acoustic intensity, which usually has positive and negative values that correspond to energy sources and sinks on the surface of the radiating structure. Sound from source and sink areas partially cancel each other and only a fraction of the near-field acoustic energy reaches the far-field. In this paper, an alternative method to identify the surface areas of a vibrating structure that contribute to the radiated sound power is described. The surface contributions of the structure are based on the acoustic radiation modes and are computed for all boundaries of the acoustic domain. In contrast to the sound intensity, the surface contributions are always positive and no cancellation effects exist. To illustrate the method, the radiated sound power from a resonator is presented.
UR - http://www.scopus.com/inward/record.url?scp=84903837472&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84903837472
SN - 9781632662682
T3 - Annual Conference of the Australian Acoustical Society 2013, Acoustics 2013: Science, Technology and Amenity
SP - 193
EP - 196
BT - Annual Conference of the Australian Acoustical Society 2013, Acoustics 2013
PB - Australian Acoustical Society
T2 - Annual Conference of the Australian Acoustical Society 2013: Science, Technology and Amenity, Acoustics 2013
Y2 - 17 November 2013 through 20 November 2013
ER -