Sounding device

Abstract

The invention relates to a sounding device which comprises a substrate, a first electrode, a second electrode, a sounding element and a conductive bonding layer, wherein the first electrode and the second electrode are arranged on the substrate at intervals ; the sounding element has a carbon nano tube structure, and the carbon nano tube structure is electrically connected with the first electrode and the second electrode; the conductive bonding layer is arranged on the surfaces of the first electrode and the second electrode; the sounding element is fixed to the conductive bonding layer; theconductive bonding layer permeates into the sounding element; the sounding element is suspended relative to the substrate, and a distance is reserved between the sounding element and the substrate. The sounding element of the sounding device, the first electrode and the second electrode have favorable electrical connectivity; since the sounding element is suspended relative to the substrate, a distance is reserved between the sounding element and the substrate, and heat generated inside for sounding can be rapidly conducted to ambient media, thereby effectively improving the sounding effect of the sounding device.

Description

technical field [0001] The invention relates to a sounding device, in particular to a sounding device based on carbon nanotubes. 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 thermoacoustic device is one of the sound-generating devices, which is a sound-generating device based on the thermoacoustic effect. [0003] H.D.Arnold and I.B.Crandall introduced a simple thermal sound generating device in the document "The thermophone as a precision source of sound", Phys. Rev. 10, p22-38 (1917), which uses a platinum plate as the sound generating element. Since the sounding frequency of the sounding element is closely related to its heat capacity per unit area, the heat capacity per unit area is large, the sounding frequency range is narrow, and the sound wave intensity is low; on the contrary,...

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Problems solved by technology

[0005] However, since the carbon nanotube film 14 is directly attached to the substrate 12, the contact area between the carbon nanotube film 14 and the surrounding medium is reduced, and the heat generated by the carbon nanotube film 14 for sound generation is large. Part is absorbed by the substrate 12, which reduces the sounding effect of the sounding device 10; at the same time, since the carbon nanotube film 14 is directly in contact with the two electrodes 16 through its own viscosity, the carbon nanotube film 14 14 and the two electrodes 16 need to be improved to improve the sounding effect of the entire sounding device 10

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