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《Journal of Applied Acoustics》 2020-03
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A new method to detect the sound of computer keyboard

ZHANG Mengyu;WANG Xulong;ZHANG Zhongning;LI Jie;YANG Jing;LIANG Bin;CHENG Jianchun;Institute of Acoustics, Nanjing University;Collaborative Innovation Center of Advanced Microstructures;Suzhou Bangguan Automation Company;  
The traditional sound detection of computer keyboard uses a mute-motor to tap the cap of keyboard.Besides, the process of detection must be in the silent room. The cost of sound detection is very expensive so that it can't be used widely. In this letter, we propose an advanced method to detect the sound of keyboard.First, the electromagnet, which is driven by the analog signal, taps the cap of keyboard. By this way, the process of tapping caps can be perfectly simulated. Then we designed a cavity, which can insulate the background noise effectively. The microphone was placed in the cavity and near by the electromagnet and keyboard, which can improve the signal-noise ratio effectively. The proposed design could open up an alternative avenue for the sound detection of computer keyboard.
【Fund】: 国家自然科学基金项目(11374157)
【CateGory Index】: TP334.23;TN641;O42
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