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Sound device

A sound-generating device and thermal sound-generating technology, which is applied to sensors, electrical components, sensor parts, etc., can solve the problems of inability to meet daily applications and low sound-emitting intensity, and achieve good sound-emitting effect, wide sound-emitting frequency range, and high sound-emitting intensity. Effect

Active Publication Date: 2016-06-15
BEIJING FUNATE INNOVATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Limited by the heat capacity per unit area of ​​the material, the sounding frequency of the sounding device using the platinum sheet as the sounding element 102 can only reach up to 4 kHz and the sounding intensity is low
Therefore, the above-mentioned thermosounders utilizing the thermoacoustic effect cannot satisfy daily applications

Method used

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Embodiment Construction

[0014] The sound generating device according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0015] see figure 2 The first embodiment of the present invention provides a sounding device 10 , the sounding device 10 includes a sounding module 110 , a first protection structure 120 , a second protection structure 130 and an infrared reflection film 140 . The first protection structure 120 and the second protection structure 130 are respectively disposed on both sides of the sound module 110 . The infrared reflection film 140 is disposed on the surface of the first protection structure 120 .

[0016] The sound module 110 includes a thermal sound film 112 , at least one first electrode 114 and at least one second electrode 116 . The first electrode 114 and the second electrode 116 are electrically connected to the thermal sound-emitting film 112 at a distance from each other. Specifically, the first ele...

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Abstract

The present invention relates to a sounding device, which includes: a sounding module, the sounding module includes at least one first electrode, at least one second electrode and a thermal sounding film, the first electrode and the second electrode are spaced apart from each other The thermosound film is electrically connected, wherein, the thermosound film includes a carbon nanotube structure, and the sound generating device further includes a first protection structure, a second protection structure and an infrared reflection film, and the thermosound film is set Between the first protection structure and the second protection structure, the infrared reflection film is arranged on the surface of the first protection structure.

Description

technical field [0001] The invention relates to a sound-generating device, in particular to a sound-generating device based on the principle of thermoacoustics. Background technique [0002] As early as the beginning of the twentieth century, H.D.Arnold et al. proposed a thermoacoustic sound generator based on the thermoacoustic effect, see the document "Thethermophoneasa precisionsourceofsound", H.D.Arnold, I.B.Crandall, Phys.Rev.10, 22-38 (1917) and "OnSomeThermalEffectsofElectricCurrents", William Henry Preece, Proceeding soft the Royal Society of London, Vol. 30, pp408-411 (1879-1881). The thermosound generator realizes sound by passing alternating current into a conductor. The conductor must have a small heat capacity, a thin thickness, and can quickly transfer the heat generated inside it to the surrounding gas medium. When the alternating current passes through the conductor, with the change of the current intensity of the alternating current, the conductor can rapi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R23/00
Inventor 刘亮
Owner BEIJING FUNATE INNOVATION TECH