Abstract
A new method of acoustic emission measurements has been developed which allows a continuous sampling and storage of acoustic emission signal from up to four channels with a high sampling frequency. The approach differs qualitatively from the acoustic emission methods reported in the literature since it makes it possible to store the complete frequency spectra as measured by the detector and to make arbitrary analyses after the measurement including the analysis of effects that are below sensitivity threshold of the techniques used in the past. First applications of the method are presented for pure (99.99%) aluminium, AZ31 magnesium and Al-4.8% Mg aluminium alloys deformed at room temperature.

Key words
acoustic emission (AE), PLC effect, aluminium, magnesium, AZ31.

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