Earphone

摘要

The disclosure relates to an earphone. The earphone includes a housing, a first speaker located in the housing and configured to play a first sound in a high frequency range, and a second speaker located in the housing and configured to play a second sound in a low frequency range or a middle frequency range. The first speaker includes a thermoacoustic device unit including a sound wave generator including carbon nanotube structure. The second speaker is an electric loudspeaker, electromagnetic speaker, or capacitive speaker.

主权项

1. An earphone, the earphone comprising:
a housing; a first speaker located in the housing and configured to play a first sound in a high frequency range; and a second speaker located in the housing and configured to play a second sound in a low frequency range or a middle frequency range; wherein the first speaker comprises a plurality of thermoacoustic device units arranged in an array and each of the plurality of thermoacoustic device units comprises: a substrate having a first surface and a second surface opposite to the first surface; a sound wave generator located on the first surface and insulated from the substrate; and a 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 that are parallel with and spaced from each other, at least one of the plurality of recesses is located between the first electrode and the second electrode, 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 suspended over the at least one of the plurality of recesses.