Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, P. O. Box 2711-27, Beijing 100190, People's Republic of China.
J Acoust Soc Am. 2011 Nov;130(5):2709-19. doi: 10.1121/1.3647300.
A model to modulate acoustic field in a regenerator of a thermoacoustic system by the double loudspeakers method is presented in this paper. The equations are derived for acoustic field modulation. They represent the relations among acoustic field (complex pressure p(0), complex velocity u(0), and acoustic impedance Z(0)), driving parameters of loudspeakers (voltage amplitude and its phase difference), and operating parameters involved in a matrix H (frequency, temperature of regenerator). The range of acoustic field is adjustable and limited by the maximal driving voltages of loudspeakers according to driving parameters. The range is simulated and analyzed in the amplitude-phase and complex coordinate planes for a given or variable H. The simulated results indicate that the range has its intrinsic characteristics. The expected acoustic field in a regenerator can be obtained feasibly by the modulation.
本文提出了一种通过双扬声器方法调节热声系统回热器中声场的模型。推导了声场调制的方程。它们表示了声场（复压 p(0)、复速度 u(0)和声阻抗 Z(0)）、扬声器的驱动参数（电压幅度及其相位差）以及与矩阵 H（频率、回热器温度）相关的工作参数之间的关系。声场的范围可以根据驱动参数在最大驱动电压的限制内进行调节。针对给定或变化的 H，在幅度-相位和复数坐标平面上对该范围进行了模拟和分析。模拟结果表明，该范围具有内在特性。可以通过调制来获得回热器中预期的声场。
