Flexibility has been in the minds of companies as more and more delve into foldable electonics, such as rollable displays, but a rollable speaker is unheard of. Usually, the softness required for a bendable design would muffle sound. Now Fujifilm has developed the “Beat” diaphragm (vibrating plate) that uses a viscoelastic polymer that softens when rolled or folded, but hardens when it is subjected to 20Hz to 20kHz, the sound range expected from a speaker. Piezoelectric ceramics provide the sound as it vibrates, while the viscoelastic polymer functions as a diaphragm. For now these bendable speakers don’t seem to have any commercial use yet, but the possibilities are endless, as evidenced by the rollable unit and a folding fan prototype in the picture.
Source: Tech On