The hottest graphene speakers produce sound throug

2022-10-19
  • Detail

Graphene speakers produce sound through heat and do not rely on vibration

traditional speakers produce sound by mechanical vibration. Qualification certification for processors is a valuable and effective proof. The principle is to generate sound waves by vibrating air back and forth through moving coils and diaphragms. This technology has hardly changed since the data information will be displayed in the form of word tables for more than a century. Researchers at the University of Exeter in the UK have designed a groundbreaking method to make graphene produce complex and controllable sound signals. In fact, this method combines speakers, amplifiers and graphic equalizers into miniature chips. [electromechanical information] at present, this technology is still under in-depth research and feasibility testing. If it develops smoothly, graphene thermoacoustic speakers will be used in miniature headphones, speakers and other small speakers, and can also be expanded to the medical field and the telecommunications industry

traditional speakers rely on mechanical vibration to produce sound. The principle is to vibrate the air back and forth through the moving coil and diaphragm to produce sound waves. This technology has hardly changed for more than a century. Researchers at the University of Exeter in the UK have designed a groundbreaking method to make graphene produce complex and controllable sound signals. In fact, this method combines speakers, amplifiers and graphic equalizers into miniature chips

the new technology of researchers at the University of Exeter does not involve any vibrating parts. The atomic thin layer made of graphene is rapidly heated and cooled by alternating current, and this thermal change is transferred to the air to expand and contract the air, thereby generating sound waves

although converting heat into sound is not an advanced technology, Exeter's research team first proved that this simple process can also complete sound frequency mixing, and sound amplification and equalization can all be achieved in a millimeter sized chip. The physical properties of graphene itself are completely transparent. In addition, the chip thin layer can produce complex sound without making a big difference between its physical properties and metals, and its energy consumption is lower than that of the traditional vibration mode. This is indeed a breakthrough for the new generation of audio-visual technology

David, senior lecturer in Exeter quantum systems and nanomaterials David horsell explained that thermoacoustic (the sound of heat transfer conversion) was once ignored because people felt that its usability was not high. But we found that by controlling the thermoacoustic generated by graphene current, we can not only change its volume, but also control the frequency of thermoacoustic. These functions have been realized, and thermoacoustic will be applied to many fields

mixing is the key to the application of graphene thermoacoustic. According to the sound generation mechanism, we can use two or more different sound sources to mix them, so as to effectively produce ultrasonic waves (and infrasound). What's more exciting is that this mixing method will be easier to control, which may be beneficial to the telecommunications industry. The telecommunications industry needs to combine signals in this way. At present, the use of telecommunications is quite complex, And the cost is very high

published by electromechanical finishing, such as smoke and dust filtering device: it needs to be reproduced by using drinking water filtering material. Please indicate the source of the article. For more industry information, please click attention: electromechanical industry

Copyright © 2011 JIN SHI