Earphone

摘要

An earphone includes a housing and a thermoacoustic device. The housing has a hollow structure. The thermoacoustic device is disposed in the housing. The thermoacoustic device 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 substrate includes a first surface and a second surface opposite to the first surface. The first surface defines a number of recesses parallel with and spaced from each other. A depth of each of the recesses ranges from about 100 micrometers to about 200 micrometers. The sound wave generator is located on the first surface of the substrate. The sound wave generator includes a carbon nanotube structure that is suspended over the recesses.

主权项

1. An earphone, the earphone comprising:
a housing having a hollow structure; a thermoacoustic device disposed in the housing, wherein the thermoacoustic device comprising:
a substrate having a first surface and a second surface, opposite to the first surface;a sound wave generator located on the first surface of the substrate; anda first electrode and a second electrode spaced from each other and electrically connected to the sound wave generator;wherein the substrate comprises silicon, and the first surface defines a plurality of recesses parallel with and spaced from each other, a depth of each of the plurality of recesses ranges from about 100 micrometers to about 200 micrometers, and the sound wave generator comprises a carbon nanotube structure that is suspended over the plurality of recesses.