Patent ID: 8270639

Claim:
A thermoacoustic device, comprising: at least one first electrode; at least one second electrode; a sound wave generator electrically connected to the at least one first electrode and the at least one second electrode to receive a signal; an infrared reflecting element having an infrared reflection coefficient higher than 30 percent and located at one side of the sound wave generator, the infrared reflecting element comprising an infrared reflecting surface facing to the sound wave generator, wherein the sound wave generator comprises a carbon nanotube film comprising a plurality of carbon nanotubes orderly arranged therein and joined end-to-end by the van der Waals attractive force therebetween; wherein the infrared reflecting element and the sound wave generator are located apart from each other, the infrared reflecting surface and the sound wave generator define a heat insulation space; the sound wave generator is capable of converting signals into heat transferred to a surrounding medium.