T-shirt for phone

Orange has provided an interesting solution for charging the phone, which will allow you to charge your phone in any fairly “noisy” environment.
The T-shirt contains a piezoelectric film, which is found in modern Hi-Fi speakers and is A4-sized. The meaning of technology is that when sound waves are applied to a film, quartz crystals are compressed to produce electricity, which in turn enters the battery.

The developers believe that when sound waves are applied to the film, about 80 dB (approximately the same loudness can be found on a busy street), the disc will produce up to 6 W / h;