The effect of different incentive methods on ultrasonicfield distribution in bounded space
YAN Jing, ZHU Feifei, ZHANG Mingduo*, ZHENG Baoning, LI Yangyang
（School of Physics and Information Technology, Shaanxi Normal University,Shaanxi Key Laboratory of Ultrasonics, Xi′an 710119, Shaanxi, China）
Abstract:
Based on the sound wave superposition principle, the acoustic field distribution in a rectangular space is analyzed. The ultrasonic field distributions are experimentally studied under different incentives.It can be found that under single frequency sine signal, the sound field induced by higher frequency sound source distribute more uniformity.Because of incoherence among sound waves, the sound field uniformities under synthetic signals are observably improved than the single frequency signal.Further more the uniformity of sound field is obviously improved as the increasing of frequency.The results indicate that the bandwidths of synthetic signals should be choose to gain more uniformity sound field.
KeyWords:
single frequency signal; synthetic signal; ultrasonic field distribution; uniformity
