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The use of the method of Empirical Mode Decomposition (EMD) is explored for the detection of changes in the structural response data of multi-level structure investigated experimentally. A three level structure is excited using a band limited white noise covering initial ten natural frequencies. Damage to the structure is simulated by giving impulse on a level. Firstly adopt EMD technique to decompose the response signal of structure vibration into several mono-component signals calleddoaj:a9b0fdc3ecf043259784aa96b714ecb5 fatcat:2nymsrknvnglpmwsd2fhnz6fzm