Wavelet analysis of helicopter noise signal

• 来源期刊: 声学学报（英文版）
• 学科: 工学
• 年，卷（期）: 2002,（1）
• 页码范围: 23-29
• 页数: 7页
• 分类号: TB5
• 语种: 英文

摘要

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.