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Sound-generating device

A technology for a sounding device and a generating device, which is applied to sensors, electrical components, sensor parts, etc., can solve the problems of low sounding intensity of sounding element 102, narrow sounding frequency range of sounding element 102, and difficulty for human ears, etc., and achieves small thermal lag. , The effect of fast heat exchange and rapid heating

Active Publication Date: 2010-06-23
TSINGHUA UNIV +1
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Problems solved by technology

[0005] In summary, the sounding frequency range of the sounding element 102 is relatively narrow, and the sounding intensity of the sounding element 102 is low, which is difficult for the human ear to directly perceive

Method used

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Embodiment Construction

[0015] The sound generating device of the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0016] see figure 2 , the first embodiment of the present invention provides a sound generating device 10 , the sound generating device 10 includes a signal input device 12 , a sound generating element 14 , a supporting structure 16 , a first electrode 142 and a second electrode 144 . The first electrode 142 and the second electrode 144 are spaced apart and electrically connected to the signal input device 12 . The support structure 16 supports the sound emitting element 14 , the first electrode 142 and the second electrode 144 .

[0017] The sound emitting element 14 includes at least one carbon nanotube wire structure 140 , and the carbon nanotube wire structure 140 includes at least one carbon nanotube wire. The heat capacity per unit area of ​​the carbon nanotube linear structure 140 is less than 2×10 -4 Joule pe...

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Abstract

The invention relates to a sound-generating device, comprising a sound-generating component and a signal input device, wherein the sound-generating component comprises at least a carbon nano tube line shaped structure, and the signal input device inputs a signal to the carbon nano tube line shaped structure to ensure the carbon nano tube line shaped structure to change the density of the surrounding medium to send out sound waves. The sound-generating device can be used in the earphones, sound boxes, radios and the like.

Description

technical field [0001] The invention relates to a sound generating device, in particular to a sound generating device based on thermoacoustic effect. Background technique [0002] The sounding device is generally composed of a signal input device and a sounding element, and a signal is input to the sounding element through the signal inputting device, and then a sound is emitted. The sound emitting element in the prior art is generally a loudspeaker. The loudspeaker is an electro-acoustic device that converts electrical signals into sound signals. Specifically, the speaker can convert audio electric power signals within a certain range into audible sounds with less distortion and sufficient sound pressure level. There are many types of existing loudspeakers, which can be divided into electrodynamic loudspeakers, electromagnetic loudspeakers, electrostatic loudspeakers and piezoelectric loudspeakers according to their working principles. Although they work in different way...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R23/00C01B31/02
Inventor 姜开利杨远超陈卓肖林范守善
Owner TSINGHUA UNIV
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