The acousticalwave equation is presented a serial spatial and time iterative equations and room acoustics field is simulated using finite difference time domain method.
时域有限差分法将声波基本方程表示为一个时间和空间的迭代方程组，实现对室内声场中低频段的模拟计算。
2
Precisely estimated time delay of acoustic wave signal is very important to implementing the most accurately measurement of temperature using acoustical method in the strong noise environment.
声波信号时延的准确估计是实现强噪声环境下声学法高精度测温的关键。
3
The mechanism for low noise asphalt pavement to lower tyre noise is analyzed. A acoustical model is put forward. The resonance frequency of sound wave is analyzed with Helmholtz resonator model.