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中文摘要：
压力比率是为评估 athermoacoustic 热引擎的重要参数之一。所谓的听觉的泵，能够显著地增加一台 thermoacoustic 热引擎的压力比率，被建议。它的操作原则被给。另外，一个确认实验在 energy-focusedthermoacoustic 热引擎用完氮气体，证明压力比率从 1.25 ～ 1.47 增加了。
英文摘要：
Pressure ratio is one of the important parameters for evaluating a thermoacoustic heat engine. A so-called acoustical pump, which is capable of significantly increasing pressure ratio of a thermoacoustic heat engine, is proposed. Its operating principle is given. Also, a verification experiment is done with nitrogen gas in the energy-focused thermoacoustic heat engine, showing that the pressure ratio increased from 1.25 to 1.47.
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