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《Technical Acoustics》 2004-04
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Experimental comparison between reciprocity method and radiation forcebalance for the measurement of ultrasonic power of plane waves

DUAN Shi-mei, SHOU Wen-de, HE Pei-zhong(Department of Biomedical Engineering, Shanghai JiaoTong University, Shanghai 200030, China)  
In this paper, a new measurement method based on the reciprocity principle for plane wave acoustic power is compared with the radiation force balance (RFB) technique. Acoustic powers radiated from two different ultrasonic transducers are measured with the two methods respectively. The experiment show that the result of reciprocity method agrees well with RFB within the range of applied voltage. The overall uncertainty of the reciprocity method is ±4.4%, which is better than that of RFB. The reciprocity method has a number of advantages over RFB such as low requirements for equipment, high signal-to-noise ratio, better steadiness, and less bubble interference and environmental noise. Therefore it is more appropriate for measuring low acoustic power with high accuracy.
【Fund】: 国家自然科学基金的资助(NO.39970209)
【CateGory Index】: TB559
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