Helicopter noise features under typical flight condition were investigated based on wavelet transform. The contribution of blade-vortex interaction (BVI) to helicopter noise and low frequency oscillations beat was sho...Helicopter noise features under typical flight condition were investigated based on wavelet transform. The contribution of blade-vortex interaction (BVI) to helicopter noise and low frequency oscillations beat was shown clearly from the detail of wavelet decomposition for helicopter noise signal.展开更多
文摘Helicopter noise features under typical flight condition were investigated based on wavelet transform. The contribution of blade-vortex interaction (BVI) to helicopter noise and low frequency oscillations beat was shown clearly from the detail of wavelet decomposition for helicopter noise signal.
