Bubbles go squeak

日期:2019-03-07 01:14:02 作者:郦秒炱 阅读:

Flat loudspeakers made from thin films of rubber bubbles have been developed by engineers in California. Roy Kornbluh and his colleagues at SRI International in Menlo Park made use of electrostrictive silicone, a rubber that expands or contracts in an electric field. Varying the voltage across the films, which are just 0.1 millimetres thick, makes the bubbles pulse in and out, producing sound. Unlike rival flat designs, these speakers do not need drivers to push a diaphragm in and out. At the moment,