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A thermal sounding device and an electronic device

A technology of thermally induced sound generation and electronic devices, which is applied in the directions of electrical components, sensors, sensor parts, etc., can solve the problems of low sound generation efficiency, etc., and achieve the effects of simple structure, low heat capacity, and cost reduction.

Active Publication Date: 2012-10-10
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the limitation of the material itself, the thermoacoustic device using the platinum sheet as the thermoacoustic element can only produce a sound frequency up to 4 kHz, and the sound efficiency is low

Method used

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  • A thermal sounding device and an electronic device
  • A thermal sounding device and an electronic device
  • A thermal sounding device and an electronic device

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Embodiment Construction

[0034] The thermoacoustic device provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following embodiments, the same components are denoted by the same reference numerals. The schematic diagrams involved in the embodiments of the present invention are for better description of the embodiments, and have no limiting effect on the embodiments themselves.

[0035] see figure 1 and figure 2 , The first embodiment of the present invention provides a thermoacoustic device 10 , the thermoacoustic device 10 includes a thermoacoustic element 102 and a heating device 104 .

[0036] The heating device 104 is used to provide energy to the thermoacoustic element 102 to make the thermoacoustic element 102 generate heat and emit sound. In this embodiment, the heating device 104 provides electric energy to the thermoacoustic element, so that the thermoacoustic element 102 generates heat under the action ...

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Abstract

A thermal sounding device comprises a substrate, a thermal sounding element arranged on the surface of the substrate, and a heating device used for providing energy to the thermal sounding element to enable the thermal sounding element to produce heat, wherein the thermal sounding element comprises a composite film, the composite film comprises at least a first carbon nano tube layer and at least one graphene film with the first carbon nano tube layer and the graphene film being stacked over each other, the substrate comprises a carbon nano tube composite structure, and the carbon nano tube composite structure comprises a second carbon nano tube layer and an insulation material layer coated on the surface of the second carbon nano tube layer. The invention further provides an electronic device using the thermal sounding device.

Description

technical field [0001] The invention relates to a thermoacoustic device, in particular to a graphene-based thermoacoustic device and an electronic device using the thermoacoustic device. Background technique [0002] The thermoacoustic device generally consists of a signal input device and a sound-generating element, and a signal is input to the sound-generating element through the signal input device to emit sound. The thermoacoustic device is a kind of sound-generating device, which is based on the thermoacoustic effect, please refer to the literature "The Thermophone", EDWARD C. WENTE, Vol.XIX, No.4, p333-345 and "On Some Thermal Effects of Electric Currents", William Henry Preece, Proceedings of the Royal Society of London, Vol.30, p408-411 (1879-1881). It discloses a thermoacoustic device, and the thermoacoustic device realizes sound generation by feeding an alternating current into a conductor. The conductor has a small heat capacity (Heat capacity), thin thickness, ...

Claims

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Application Information

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IPC IPC(8): H04R23/00
Inventor 姜开利林晓阳肖林范守善
Owner TSINGHUA UNIV
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