Location
Salt Lake Community College
Start Date
5-7-2007 3:40 PM
Description
Understanding the acoustic field radiated by finite-amplitude sources such as rockets and jets can be important for assessing the impact on involved structures and surrounding communities. Near-field acoustical holography (NAH) can be used to image source radiation. However, this technique, based on linear equations, does not account for nonlinear behavior. A propagation algorithm that accounts for nonlinear effects is used to propagate a broadband waveform in one-dimension. The waveform is then reconstructed at various distances using NAH. The errors are presented and discussed for several amplitude cases.
Errors in Holographic Imaging of Acoustic Sources Due to Nonlinear Propogation
Salt Lake Community College
Understanding the acoustic field radiated by finite-amplitude sources such as rockets and jets can be important for assessing the impact on involved structures and surrounding communities. Near-field acoustical holography (NAH) can be used to image source radiation. However, this technique, based on linear equations, does not account for nonlinear behavior. A propagation algorithm that accounts for nonlinear effects is used to propagate a broadband waveform in one-dimension. The waveform is then reconstructed at various distances using NAH. The errors are presented and discussed for several amplitude cases.