A nanoscale sound wave generator with adjustable timbre

Abstract

The invention discloses a tone-adjustable nanometer grade sound wave generator, which comprises a substrate with the heat conductivity being lower than 200W / mK, a sound wave generating film flatly laid on the substrate, two silver gel electrodes for audio current input and an electric signal input unit, wherein the two silver gel electrodes are respectively arranged at the two ends of the sound wave generating film; the sound wave generating film, the two silver gel electrodes and the electric signal input units are connected in series for forming a loop; the sound wave generating film is a graphene film; the thickness is not greater than 60nm; the density is between 2.0 and 2.2g / cm<3>; the crosslinking is performed between the graphene layers; the crosslinking degree is 1 to 5 percent. The graphene film has excellent electric heating performance and heat conductivity; the heat vibration of air in the film position can be effectively caused. The sound quality of the sound generating device is good; the sound definition is high; the sound excited wave form is regulated through regulating and controlling the heat conductivity of the film and designing a suspended bearing and collecting point in the middle of the film; the tone is further regulated.

Description

technical field [0001] The invention relates to a high-performance nanometer material and a preparation method thereof, in particular to a nanoscale sound wave generator with adjustable timbre. Background technique [0002] In 2010, two professors Andre GeiM and Konstantin Novoselov from the University of Manchester won the Nobel Prize in Physics for their first successful separation of stable graphene, which set off a wave of research on graphene around the world. Graphene has excellent electrical properties (electron mobility up to 2×105cM2 / Vs at room temperature), outstanding performance (5000W / (MK), extraordinary specific surface area (2630M2 / g), and its Young’s modulus (1100GPa) and breaking strength (125GPa). The excellent electrical and thermal conductivity of graphene completely exceeds that of metals. At the same time, graphene has the advantages of high temperature resistance and corrosion resistance, and its good mechanical properties and low density make it have ...

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Problems solved by technology

However, the above two films have inevitable defects. First, the structural defects are large and the heating rate is slow; second, the thickness is high and the cooling rate is slow, so the sound clarity is poor; third, the temperature resistance of the film is relatively low Poor, the sound adjustment is poor; the most important thing is that none of the above films can adjust the tone, so there is no difference in the sound

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