Finally, the cooling temperature of the thermoacousticlly driven pulse tube cooler is deceased from 83.5K to 81.6K with the acoustic amplifier.

• 最后采用不同长度的声学放大器进行热声驱动脉管制冷机实验，使单级脉管制冷机制冷温度由原来的83.；5K下降到81