This paper describes a resonance decay estimation for structural health monitoring in the presence of nonstationary vibrations.\r\nIn structural health monitoring, the structure�s frequency response and resonant decay characteristics are very important for\r\nunderstanding how the structure changes. Cumulative spectral analysis (CSA) estimates the frequency decay by using the impulse\r\nresponse. However, measuring the impulse response of buildings is impractical due to the need to shake the building itself. In a\r\nprevious study,we reported on system dampingmonitoring using cumulative harmonic analysis (CHA),which is based on CSA.The\r\ncurrent study describes scale model experiments on estimating the hidden resonance decay under non-stationary noise conditions\r\nby using CSA for structural condition monitoring.
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