Studies on sound field with non-adiabatic system

这是声音的传播，到目前为止一直作为绝热系统讨论，但热的运动不能忽视，例如，在很薄的管中。在本研究中，我进行了声波传播的计算，引入了分子动力学方法，对声场进行了分析，也认识到声场测量技术对声场的影响并不大，然后从计算和实验两方面阐述了声场在不可忽视的传热状态下的作用。这使得用分子动力学方法进行考虑传热的声场计算成为可能。我还提出了非线性声场的方法，使非线性现象的计算成为可能。此外，利用高速摄像机或激光建立了不影响声场的声场测量技术，证实了薄管中声场的行为。

It is the propagation of sound, which has been discussed as adiabatic system so far, but the movement of heat can not be ignored, for example, in the tube very thin. In this study, I perform the calculation of wave propagation which introduced the molecular dynamics method, the analysis of the sound field, and I also realize the sound field measurement technique does not affect the sound field further, and then it is intended to elucidate the sound field in a state that can not be ignored transfer of heat from both the calculations and experiments.Which made it possible to sound field calculation in consideration of heat transfer by using the molecular dynamics method. I also proposed methods to nonlinear sound field, which makes it possible to calculate the non-linear phenomena. Further, establishing sound field measurement techniques that does not affect the sound field using a high-speed camera or a laser, it was confirmed the behavior of the sound field in the thin tube.