Rubber speaker

Specialists Japanese company Tokai Rubber Industries developed the world's first fully rubber speaker. The device uses the so-called rubber Smart Rubber, conductive and able to expand and contract, generating a sound. According to representatives of Tokai Rubber Industries, presented by other manufacturers thin speakers using piezoelectric materials and can not produce low frequency sound. Rubber speaker is characterized in that, with a small thickness, capable of producing bass. The device consists of a nonconductive rubber layer placed between the two rubber electrodes Smart Rubber. When voltage appears static electricity that causes the speaker to expand, according to Diginfo.

Source: mirfactov.com/