Bakar AHALegg MKonings DAlam F2023-032022-12-022023-03Ultrasonics, 2023, 129 pp. 106912 - ?https://hdl.handle.net/10179/17931The stiffness of wood can be estimated from the acoustic velocity in the longitudinal direction. Studies have reported that stiffness measurements obtained using time-of-flight acoustic velocity measurements are overestimated compared to those obtained using the acoustic resonance and bending test methods. More research is needed to understand what is causing this phenomenon. In this work, amplitude threshold time-of-flight, resonance, and guided wave measurements are performed on wooden and aluminium rods. Using guided wave theory, it is shown through simulations and experimental results that dispersion causes an overestimation of time-of-flight measurements. This overestimation was able to be mitigated using dispersion compensation. However, other guided wave techniques could potentially be used to obtain improved measurements.106912 - ?AluminiumAmplitude thresholdGuided wavesRodToFWoodElasticity Imaging TechniquesUltrasonographyAcousticsVibrationPhantoms, ImagingJournal article10.1016/j.ultras.2022.1069124585301874-9968Massey_Dark0203 Classical Physics0912 Materials Engineering0913 Mechanical Engineering