Ayrinhac, S., Devos, A., Rufflé, B., Foret, M. (2026). Comment on “Influence of layer thickness on time domain Brillouin scattering oscillation amplitude in multilayer films” [J. Appl. Phys. 136, 225302 (2024)]. Journal of Applied Physics. https://doi.org/10.1063/5.0284277