Analysis and Characterization of Flow-Generated Sound

• 作者: Dominik Surek
• 来源期刊: 美国计算数学期刊(英文)
• 学科: 数学
• 关键词: Fluid FLOW FLUIDS Akustics SPECTRUM WAVELETS
• 年，卷（期）: mgjssxqkyw_2013,（4）
• 页码范围: 362-367
• 页数: 6页
• 分类号: O1

摘要

Flow-generated sound and velocity distributions of free flows are characterized by frequency spectra (FFT and several spectra from the octave spectrum over the one-third octave spectrum till the narrow band spectrum), by the PSD (power spectrum density) and wavelets. Whereas previously, flow processes are characterized by the average velocity, by the local velocity, if needed also by the three-dimensional velocity distribution and the degree of turbulence, also the flows and particular velocity distributions could be described by the acoustic pressure and level, by the power spectrum density and by wavelets, especially by the Gabor-Wavelet, as shown below.