THE USE OF CERTAIN PARAMETERS OF THE ACOU STIC-EMISSION ANALYSIS FOR THE CONTROL OF WOOD DRYING PROCESSES

Drying stresses within timber are influenced decisively by the course of the drying process. Process depending changes of these stresses cau se acoustic signals emitted by the wood. These acoustic emissions are dependent on wood density, fibre length and moisture content concernin g their frequency, amplitude and energy. If the determined emission pa rameters can be further quantified, the analysis of acoustic emission could be used as a non-destructive test method for controlling the dry ing process of timber.