【Title】A synthesis pattern of acoustic field produced by phased array based on the direct weighting of the controlled acoustic pressure

【Author】HU Jiwen~(1,2) QIAN Shengyou~(1(?)) DING Yajun~1 (1 College of Physics and Information Science,Hunan Normal University Changsha 410081) (2 College of Mathematics and Physics, University of South China Hengyang 421001)

【Abstract】To optimize the acoustic field produced by phased array effectively and quickly, the pseudo-inverse method proposed previously is simplified. An approximate weight formula of sound pressure using a method of compensation to the amplitude and phase of the controlled sound pressure was presented. A multiple-focus field patterns based on the pseudo-inverse matrix algorithm can be obtained by presetting the value of the controlled sound pressure. A phased array comprised of 16×16 square elements is used for numerical simulation. The results show that the acoustic energy can be effectively deposited at the desired points, and the acoustic field can be synthesized quickly using the direct weight formula of the sound pressure. This study may offer an effective way for controlling the distribution of acoustic field in ultrasound hyperthermia.