piezoelectric acoustic fabric

I think the fabric could be developed into speakers, especially tweeters. Microphones too, but I suspect it will all come down to the quality of the results. The fabric form opens a whole new area for creative engineering in many fields and applications.
As you probably know, the piezoelectric principle is well known in audio since the early days and used for microphones, phonograph cartridges and some speakers.
 
Fascinating. A single fiber 40m long woven into another, normal fabric. From the description, it seems very sensitive. It would be nice to hear some samples of what it picks up. It will likely need a lot of DSP to be useful.