以下为句子列表：
英文: Computation results provide optimized dimensions of regenerator for different pressure ratios at a fixed acoustic power input, which could be a preliminary guide in designing a regenerator for pulse tube refrigerators.
中文: 计算了给定输入声功率、不同输入压比条件下回热器的优化尺寸，可为脉管制冷机回热器的优化设计提供参考。
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英文: Lead alloys as solder for transducers used in high-powered (designated to operate for several hours at acoustic power levels of 125 dB SPL and above) loudspeakers.
中文: 用作大功率扬声器（用在长时间操作125分贝以上的音响系统）的传感器焊料中的铅合金。
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英文: Using Finite Element and Boundary Element Method, a modal analysis model of complex structural acoustic radiation in light fluid is proposed for computing modal acoustic radiation frequency, farfield sound pressure, modal radiated acoustic power and acous
中文: 摘要采用有限元和边界元方法建立了轻流体介质中复杂结构振动声辐射的模态分析模型，可计算结构的声辐射模态频率、模态场点声压、模态辐射声功率和声辐射效率等声场特性参数。
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