Earphone
AssigneesTsinghua University, Hon Hai Precision Industry Co., Ltd.
InventorsYANG WEI, SHOU-SHAN FAN
Life of this patent
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Abstract
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.
Claims20
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.
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, wherein the first speaker comprises at least one thermoacoustic device unit;
- 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 second speaker is an electric loudspeaker, electromagnetic speaker, or capacitive speaker.
Dependencies are inferred from the claim text.