Modeling and prediction of density distribution and microstructure in particleboards from acoustic properties by correlation of non-contact high-resolution pulsed air-coupled ultrasound and X-ray images

► Correlates air coupled ultrasound and X-ray transmission images of particleboards. ► Efficient first wave tracking, lateral resolution matching and clustered regression. ► Quantitative modeling of sound velocity and amplitude with density and frequency. ► EN312 density prediction (uncertainty 3%), classification by particle geometry. ► Finite-difference simulation of arbitrarily complex porosity and grain scattering.