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本文通过数值计算及实际测量，研究了凹球面声透镜聚焦换能器及凹球面自聚焦换能器产生的声场，证实此两种聚焦方式均可获得理想的聚焦效果，但自聚焦方式更适合高强度聚焦超声（HIFU）加热治疗。
In this paper, by numerical calculation and actual measurement, we study the sound field produced by the concave spherical surface acoustic lens focusing transducer and the concave spherical surface self-focusing transducer. It is confirmed that both focusing methods can achieve the ideal focusing effect, but the self-focusing method is more suitable High intensity focused ultrasound (HIFU) heat treatment.