Future studies are encouraged to acoustically test a larger population of cells, and to produce population statistics for their acoustic characteristics in comparison to their electrochemical characteristics. Inspiration for the electrochemical characterisation of cell populations can be drawn from Dubarry et al. (100 cells), Rumpf et al. (1100 cells) and Schindler et al. (408 cells). Given the lack of generalisation shown in our study, it is recommended that future datasets also aim to minimise sources of variation. For example, tests at a single slow C-rate are recommended, controlling the cell temperature, and ensuring cell stability. Temperature in the current study varied with a standard deviation of 1.6 • C (max: 26.8 • C, min: 18.7 • C), and three different C-rates were tested. The influence of various C-rates on the acoustic response can be found in our previous work . Another possible direction for future work is to attempt an extension of the acoustic feature space, for example, by performing acoustic frequency sweeps. The identification of common patterns between cells in the extended feature space, or the lack thereof, can be evaluated by adapting the code and methods put forward in this work.