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Sounding device

A sounding device and thermal sounding technology, applied in the direction of sensors, electrical components, sensor components, etc., can solve the problems of affecting the sounding effect of the thermal sounding film 120, heating the air, and not revealing the sounding effect, etc.

Active Publication Date: 2010-07-07
BEIJING FUNATE INNOVATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the thermosound film 120 is completely attached to the surface of the glass plate, most of the heat generated by the thermosound film 120 is conducted away by the glass plate and cannot be used to heat the air.
In addition, only one side of the thermosound film 120 attached to the surface of the glass plate is in contact with the air, which reduces the heat exchange with the air, thereby affecting the sound effect of the thermosound film 120
In addition, the above documents do not disclose a protective structure for protecting both sides of the thermosound film 120 without affecting the sound effect of the thermosound film 120, at least one surface of the thermosound film 120 is directly exposed to the air, vulnerable to damage

Method used

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Embodiment Construction

[0019] The sound generating device of the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] see Figure 2 to Figure 3 , The first embodiment of the present invention provides a sound generating device 10 , which includes a thermal sound emitting film 102 , at least one first electrode 104 a , at least one second electrode 104 b , and two plate-shaped protective structures 106 . The at least one first electrode 104 a and the at least one second electrode 104 b are fixed by the plate-shaped protective structure 106 . The thermosound film 102 is disposed between the first electrode 104a and the second electrode 104b, and is fixed by the first electrode 104a and the second electrode 104b. The thermal acoustic membrane 102 can receive signals input from the first electrode 104a and the second electrode 104b to emit sound waves. The two plate-shaped protective structures 106 are arranged on both sides of the...

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Abstract

The invention relates to a sounding device which comprises at least one first electrode, at least one second electrode and a thermal sounding film, wherein the first electrodes and the second electrodes are spaced; and the thermal sounding film is electrically connected with the first electrodes and the second electrodes. The sounding device further comprises two plate-shaped protecting structures, wherein the plate-shaped protecting structures are arranged at both opposite sides of the thermal sounding film.

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 20th century, H.D.Arnold and others proposed a sounding device based on the thermoacoustic effect, please refer to the document "The thermophone as a precision source of sound", H.D.Arnold, I.B.Crandall, Phys.Rev.10, 22 -38 (1917). The sound generating device adopts a platinum sheet as a thermal sound generating element. The thickness of the platinum sheet is 0.7 microns. When alternating current passes through the platinum sheet, with the change of the alternating current intensity, the platinum sheet can rapidly rise and fall in temperature, and rapidly exchange heat with the surrounding medium of the platinum sheet, and the density of the surrounding medium also changes accordingly, and then emits sound waves. [0003] The sounding frequency of a th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R23/00C01B31/02H04R1/00
Inventor 潜力王昱权冯辰
Owner BEIJING FUNATE INNOVATION TECH
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