Experimental investigation on standing-wave tube with abrupt section and extremely nonlinear pure standing-wave field  

作　　者：MIN Qi DUAN Hong PENG Feng YIN Yao LIU Ke 

机构地区：[1]Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Sciences Beijing 100190 [2]Honghe University Yunnan 661100

出　　处：《Chinese Journal of Acoustics》2010年第4期321-330,共10页声学学报（英文版）

基　　金：the National Natural Science Foundation of China(No.10574135) ;the Main Direction Program of Knowledge Innovation of Chinese Academy of Sciences(KJCX2-YW-W02)

摘　　要：Standing-wave tube with abrupt section （STAS） was a dissonant standing-wave tube whose higher resonance frequencies were not integral multiplies of the first one. Making use of the dissonant property of STAS and through the optimization of the system, extremely nonlinear pure standing-wave field of 180 dB at the first resonance frequency and that of 177 dB at the second resonance frequency have been obtained. At the two resonance frequencies, distortion of waveform and saturation of harmonics were studied experimentally, but saturation did not appear even though under such high sound pressure levels. However, while nonlinear sound field was experimentally studied at the third resonance frequency, it was found that the frequency for the second harmonic of the third resonance frequency was close to the sixth resonance frequency of the STAS and the distortion of waveform and the saturation of harmonies appeared as the sound pressure level approached 170 dB.Standing-wave tube with abrupt section （STAS） was a dissonant standing-wave tube whose higher resonance frequencies were not integral multiplies of the first one. Making use of the dissonant property of STAS and through the optimization of the system, extremely nonlinear pure standing-wave field of 180 dB at the first resonance frequency and that of 177 dB at the second resonance frequency have been obtained. At the two resonance frequencies, distortion of waveform and saturation of harmonics were studied experimentally, but saturation did not appear even though under such high sound pressure levels. However, while nonlinear sound field was experimentally studied at the third resonance frequency, it was found that the frequency for the second harmonic of the third resonance frequency was close to the sixth resonance frequency of the STAS and the distortion of waveform and the saturation of harmonies appeared as the sound pressure level approached 170 dB.

分 类 号：TB551[理学—物理] O175[理学—声学]