This is raw data used to generate figures published in Demcenko, A., Mazilu, M., Wilson, R., Volker, A. W. F., and Cooper, J. M. (2018). “Hyperelastic tuning of one dimensional phononic band-gaps using directional stress,” IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 65(6), 1056–1061, https://doi.org/10.1109/TUFFC.2018.2821440. Data used as part of Figure 4 was provided by Prof. J. E. Michaels published in Gandhi, N., Michaels, J., and Lee, S. (2012). “Acoustoelastic lamb wave propagation in biaxially stressed plates,” Journal of the Acoustical Society of America 132(3), 1284–1293, https://doi.org/10.1121/1.4740491. Data used as part of Figure 5 was provided by Prof. E. L. Tan published in E. L. Tan, "Generalized eigenproblem of hybrid matrix for floquet wave propagation in one-dimensional phononic crystals with solids and fluids", Ultrasonics, vol. 50, no. 1, pp. 91-98, 2010, https://doi.org/10.1016/j.ultras.2009.09.007. start_floquet_test.m file presents a proof of coefficients for characteristic Floquet wave equation. The raw data are in Matlab format and data can be read using provided m-files. Figures were generated using Matlab R2015a.