In this article several methods for measurements of damping are summarized

with respect to their advantages and disadvantages. Especially the use of

Digital Filters (DF) and Fast Fourier Transform (FFT) are compared. In general

FFT analysis is best suited for heavily damped structures although with

proper memory and postprocessing facilities, lightly damped structures may

also be covered, while it is advantageous to use DF analysis when dealing

with lightly damped structures only. The use of Time-frequency analysis techniques

such as the Wavelet Transform and the Short-time Fourier Transform

is also demonstrated.