fig1
![Recent progress in flexible piezoelectric devices toward human-machine interactions](https://image.oaes.cc/e5513ded-88f2-4c95-a5e3-5fc66ebd50ad/5316.fig.1.jpg)
Figure 1. Overview of P-HMIs, including robotic control, the Internet of Things, sports coaching, acoustic therapeutics and machine learning. Reproduced with permission from ref.[42]. Copyright 2015, Royal Society of Chemistry. Reproduced with permission