The calculated results show that strong vibrating source, low gravitational level and sound medium with large density and small sound speed will enhance the levitation ability.
结果表明，提高声源强度、降低重力水平或者采用密度大声速小的气体介质有利于提高声悬浮能力。
System hardware circuit audio digital signal source achieve this functions: sound signals, sound intensity level control, data communications, liquid crystal display, alarm and power.
系统硬件电路包括音频数字信号源实现声音信号产生、数字声强级控制、多机数据通信、液晶显示和电源等模块单元。
Portable sound source for calibration of sound level meters and sound measuring system.
的便携式声级计和校准声源声测量系统。
Portable sound source for calibration of sound level meters and sound measuring system.
的便携式声级计和校准声源声测量系统。
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