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arXiv 1909.09235cs.SDcs.CEeess.AS
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论地面声的影响

On the Impact of Ground Sound

Stanford University(斯坦福大学)

Ante Qu, Doug L. James

摘要:

刚体碰撞声音合成方法经常忽略地面声音。在本文中,我们分析了一个理想化的地面声音模型的基础上的弹性动力半空间,并使用它来识别的情况下,地面声音是感知相关的,当它被掩盖的影响对象的模态声音或瞬态加速度噪声。我们的分析模型给出了一个光滑的,封闭形式的地面加速度的表达式,然后我们可以使用在瑞利积分或“声学着色器”的有限差分时域波模拟。我们发现,当模态声音是听不见的,地面声音是可听的情况下,一个密集的对象影响软地面和场景中的影响点有一个低的仰角到收听点。

英文摘要:

Rigid-body impact sound synthesis methods often omit the ground sound. In this paper we analyze an idealized ground-sound model based on an elastodynamic halfspace, and use it to identify scenarios wherein ground sound is perceptually relevant versus when it is masked by the impacting object's modal sound or transient acceleration noise. Our analytical model gives a smooth, closed-form expression for ground surface acceleration, which we can then use in the Rayleigh integral or in an "acoustic shader" for a finite-difference time-domain wave simulation. We find that when modal sound is inaudible, ground sound is audible in scenarios where a dense object impacts a soft ground and scenarios where the impact point has a low elevation angle to the listening point.

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