Patent ID: 8811632
Filing Date: 2014-08-19
Classification: B82Y,H04R,Y10S

Abstract:
1. A thermoacoustic device comprising: a substrate having at least two surfaces; at least two sound wave generators, each of the at least two sound wave generators being located on each of the at least two surfaces, wherein one of the at least two sound wave generators comprises a carbon film comprising at least one carbon nanotube layer and at least one graphene layer stacked on each other, the at least one carbon nanotube layer comprises a plurality of micropores defined by adjacent carbon nanotubes, and the at least one graphene layer covers the plurality of micropores, a heat capacity per unit area of the at least one graphene layer is less than or equal to about 2×10 at least two signal input devices configured to input signals to the at least two sound wave generators respectively.