Use of Acoustic Emissions to Control Drying Rate of Red Oak

As wood dries and shrinks, small internal fractures occur because of drying stresses. These fractures result in acoustic emissions that can be amplified and detected for use in kiln control. They can serve as an early warning signal for larger fractures that would be considered drying defects. The research reported in this paper demonstrates that the rate of acoustic emissions can be used to control temperature and relative humidity in a drying compartment.

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