Numerical Techniques in AcousticsNational Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985 - Noise - 35 pages |
Contents
Application of High Order Acoustic Finite Elements to Transmission | 1 |
Numerical Techniques for Scattering from Submerged Objects | 17 |
Statistical Signal Analysis for Systems with Interference Inputs | 29 |
Common terms and phrases
acoustic pressure Aeronautics and Space axis of symmetry Blaser boundary conditions Boundary Element Methods boundary integral boundary layer cavity resonance conditioned spectral analysis CYLINDRICAL SHELL STRUCTURE duct eigenfunction Engineering experimental data EXTERNAL TURBULENT FLOW F(Hz field points Figure 2a frequency response frequency response functions geometry Green function H₁ f H₁(f incident field Integral Equation interface interferenced interior points interior space interior volume isoparametric elements KL/2 Figure Korkan Lewis Research Center measured Miami Beach modal motion NASA NASA Lewis Research National Aeronautics Noise Control noise source numerical evaluation Numerical Techniques observer location Pekeris Performing Organization plane pressure field problem propagation quadratic Research Center Cleveland resonance SACLANT Schmidt seismology solution Space Administration statistical signal analysis submerged objects surface integral symmetry of spheroid Techniques in Acoustics three-dimensional transfer function transition matrix transmission loss Transonic u₁(t variable velocity vibration Vortex Trajectories vortices wave WAVEFIELD wavenumber Winter Annual Meeting