All-rubber speaker is both thin and bassy

AUTHOR: Inavate

Tokyo Rubber Industries has developed what it believes to be the world’s first all rubber loudspeaker. The device consists of a non-conductive rubber layer, sandwiched between two conductive layers of so-called smart rubber. The conductive layers expand and contract when a current is applied, deforming the non-conductive layer to create the plane movement required to generate sound waves in the air.