| 复频聚焦超声换能器声场研究 |
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| 引用本文： | 朱旭宁,石新军,尚志远.复频聚焦超声换能器声场研究[J].陕西师范大学学报,2002,30(3):67-70. |
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| 作者姓名： | 朱旭宁 石新军 尚志远 |
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| 作者单位： | 朱旭宁（陕西师范大学应用声学研究所,陕西,西安,710062）
石新军（陕西师范大学应用声学研究所,陕西,西安,710062）
尚志远（陕西师范大学应用声学研究所,陕西,西安,710062） |
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| 基金项目： | 国家自然科学基金资助项目(19874042) |
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| 摘 要： | 研制了一种能实现两种频率超声叠加的自聚焦型超声换能器，利用瑞利公式对其声场进行了计算，确定了焦区位置，计算结果与测量值符合较好，对复频叠加声场的频谱进行了测量，发现其有两个原波，和频波，差频波，倍频波等成分，理论分析及实验结果表明，该换能器可以实现双波叠加并产生声散射效应。
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| 关 键 词： | 复频聚焦超声换能器 复频叠加声场 声散射效应 焦区 频谱测量 抗肿瘤效应 |
| 文章编号： | 1001-3857(2002)03-0067-04 |
| 修稿时间： | 2002年2月5日 |
Study on acoustic field by a bi-frequency ultrasonic focused transducer |
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| ZHU Xu_ning,SHI Xin_jun,SHANG Zhi_yuan.Study on acoustic field by a bi-frequency ultrasonic focused transducer[J].Journal of Shaanxi Normal University: Nat Sci Ed,2002,30(3):67-70. |
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| Authors: | ZHU Xu_ning SHI Xin_jun SHANG Zhi_yuan |
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| Abstract: | A new kind of bi frequency ultrasonic focused transducer is designed, and the distribution of its acoustic field is theoretically studied. Its focal area is determinated and it is well in agreement with experimental results. Also the spectrum of the focal acoustic field radiated by the transducer in water is studied. Not only the two original waves but the sum frequency, difference frequency and multiple frequency waves have been detected, which prove the occurrence of scattering of sound by sound. |
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| Keywords: | transducer acoustic field spectrum sound scattering |
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