On using peak amplitude and rise time for AE source characterization

Acoustic Emission (AE) signals, which are electrical version of acoustic emissions, are usually analysed using a set of signal parameters. The major objective of signal analysis is to study the characteristics of the sources of emissions. Peak amplitude (P sub a ) and rise time (R sub t ) are two such parameters used for source characterization. In this paper, we theoretically investigate the efficiency of P sub a and R sub t to classify and characterize AE sources by modelling the input stress pulse and transducer. Analytical expressions obtained for P sub a and R sub t clearly indicate their use and efficiency for source characterization. It is believed that these results may be of use to investigators in areas like control systems and signal processing also.