This contribution discusses a quick and non-invasive method for the extraction of dispersion relations in CLT panels, with the aim of providing an estimate of the elastic parameters of the plates starting from the fitting of the experimental dispersion curve to the theoretical models. Measurements were performed at the Stora Enso CLT mill on panels that have different thickness and orthotropic ratio. An instrumented hammer was used to excite the plate and accelerometers were used to acquire the impulse responses. Thanks to the reciprocity principle, the measurement points were kept fixed and the hitting point was moved; this allowed to reduce the measurement time and to decrease the number of accelerometers that must be attached.The dispersion curves were evaluated using the Phase Shift method and the experimental results were fitted with the theoretical model for acoustically thick plates; finally, the elastic parameters were estimated. The results give slightly low estimates of the Young’s modulus and a fairly good estimate of the shear modulus, while Poisson ratio that optimize the fitting are “effective” values and not realistic values, as confirmed by recent literature. The precision of the hits is also analysed, while a reproducibility study is left for further developments.