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加利福尼亚的科学家说,声波制冷冰箱内安有声热发动机,它把声变成热,或把热变成声。其原理是声音产生振动,改变材料的温度,温度的改变使材料振动。声热发动机内含有一些两端带有小板
Scientists in California say that sonic refrigerators contain sound-heat engines that turn sound into heat or turn heat into sound. The principle is the sound vibration, change the material temperature, temperature changes make the material vibration. Acoustic engine contains some small plate at both ends