声质

首先，我们需要声质一定要好，而且音量要大。

First of all we need the sound to be clear and very high .

土豆条的脆、谷物早餐食品的酥、芹菜的咯吱声均属质构特征，而且我们也可以听到。

The snap of a potato chip , the crackle of a breakfast cereal , and crunch of celery are textural characteristics , but we also hear them .

简述了热声理论，指出热声转换对工质的本质要求取决于等压热膨胀系数β0。

The thermoacoustic theory is introduced in brief and it points out that the isobaric thermal expansion coefficient β 0 is the essential factor for thermal sound conversion .

分析了混合工质在热声边界层内发生分离的机理及热声循环中的泵质微循环过程，讨论热声泵质的意义及应用

Based on the analyses of a mixture of two gases separating in the acoustic boundary-layer approximation and pumping mass micro-cyclic process , the paper discusses the significance and practice