针对匀加速运动点声源的声场特性与其运动状态密切相关这一问题,提出匀加速直线运动状态下点声源的声场计算方法。利用此方法建立了匀加速直线运动时点声源的声压模型,对模型中的关键参数声矢量R进行数值解析,并对声压进行数值分析仿真,得出匀加速直线运动时固定接收点的声压数值计算方法。用此方法对固定接收点位置的匀加速点声源声压进行声场建模,结果表明:在声源接近接收者一定距离以后,声压明显增大;在此距离之外,距离对声压的影响不大。
As the sound field characteristics of uniform acceleration motion are closely related to the moving states of the sound source, the article proposes a calculation method of sound pressure produced by uniform accelerated point source. Using this method to establish the sound pressure model of uniform accelerated sound source, it describes numerical analysis and simulation methods on acoustic vector and sound pressure. A numerical calculation method of sound pressure produced by uniform accelerated sound source can be obtained on condition that receiving position is fixed. The simulation results show that the sound pressure increases significantly when the sound source getting closely to the receiver in a certain distance, and beyond the distance, it has little effect on sound pressure. It can provide theoretical support for the similar study on moving sound source.