This page is a link to https://tap-a-stick-406567576236.europe-west1.run.app/ – a web app for quickly doing vibration resonance stiffness measurement on wood and similar orthotropic materials. It is designed for doing longitudinal resonance as the primary method for assessment of dynamic modulus of elasticity (Edyn), with flexural modes as confirmation. It can also be used with torsional modes to assess shear modulus. Frequencies being measured need to be well within the normal hearing range as the web app makes use of hardware and software for computer audio.

Ridley-Ellis, D (2026) Tap-a-stick calculator for impulse excitation technique on wood. Version 1.2. (https://wood.properties/tap-a-stick/) [Web app]