船舶与海洋工程学报（英文版）
船舶與海洋工程學報（英文版）
선박여해양공정학보（영문판）
JOURNAL OF MARINE SCIENCE AND APPLICATION
2010年
1期
99-104
,共6页
李杨%李思纯%朴胜春%孙世钧
李楊%李思純%樸勝春%孫世鈞
리양%리사순%박성춘%손세균
empirical mode decomposition%energy feature extraction%fluctuant signal analysis
After an aerial object enters the water, physical changes to sounds in the water caused by the accompanying bubbles are quite complex. As a result, traditional signal analyzing methods cannot identify the real physical object. In view of this situation, a novel method for analyzing the sounds caused by an aerial object's entry into water was proposed. This method analyzes the vibrational mode of the bubbles by using empirical mode decomposition. Experimental results showed that this method can efficiently remove noise and extract the broadband pulse signal and low-frequency fluctuating signal, producing an accurate resolution of entry time and frequency. This shows the improved performance of the proposed method.
