| 摘要 |
An earphone includes a housing and a thermoacoustic device array. The housing has a hollow structure. The thermoacoustic device array is disposed in the housing. The thermoacoustic device array includes a number of thermoacoustic device units. The thermoacoustic device unit includes a substrate, a sound wave generator, a first electrode and a second electrode. The first electrode and the second electrode are spaced from each other and electrically connected to the sound wave generator. The first surface defines a number of recesses parallel with and spaced from each other. At least one of the recesses is located between the first electrode and the second electrode. A depth of each recess ranges from about 100 micrometers to about 200 micrometers. The sound wave generator is located on and insulated with the substrate. The sound wave generator includes a carbon nanotube structure suspended over the at least one recess. |
