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模拟弹性杆的声音 – 译学馆
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模拟弹性杆的声音

Animating Elastic Rods With Sound | Two Minute Papers #175

亲爱的学霸们 这里是由Károly Zsolnai-Fehér带来的两分钟论文
Dear Fellow Scholars, this is Two Minute Papers with Károly Zsolnai-Fehér.
在这个系列里 我们谈及许多逼真的渲染
In the series, we talk a lot about photorealistic rendering
确保真正模拟出虚拟物体的外观
and making sure that the appearance of our virtual objects is simulated properly.
谈了很多关于物体外观的论文
A lot of works on how things look.
然而 为了创造出更完善的感知体验
However, in order to create a more complete sensorial experience,
我们也要模拟出物体的声音来
we also have to simulate how these things sound.
今天 我们要来看一下这个酷炫的作品
And today, we’re going to have a look at a really cool piece of work
它模拟了虚拟的铝制 铁制 橡木制和橡胶弹性杆的声音
that simulates the sound of virtual elastic rods made of aluminum, steel, oak tree, and rubber.
不等你说 这也当然意味着它也能模拟出
And of course, before you ask, this also means that there will be sound simulations of
所有人都喜欢的玩具—-机灵鬼的声音
everyone’s favorite toy – the walking slinky.
和所有有关声音合成的论文一样
As for all papers that have anything to do with sound synthesis,
我建议你在看这集时戴上耳机
I recommend using a pair of headphones for this episode.
要模拟这些弹性杆发出的声音是非常困难的
The sound emerging from these elastic rods is particularly difficult to simulate because
因为声音频率随着时间会有相当大的变化
of the fact that sound frequencies vary quite a bit over time,
而且物体本身仍然在运动中
and the objects themselves are also in motion
在模拟过程中还存在变形
and subject to deformations during the simulation.
就如你在机灵鬼中所见到的
And as you will see with the slinky,
我们可能在同一瞬间有上万个接触事件
we potentially have tens of thousands of contact events in the meantime.
让我们来看一下一些成果吧
Let’s have a look at some results!
拉伸弹簧机灵鬼材质: 铁
Slinky Dispersion Material: steel
链环栅栏材质: 铝
Chain Link FenceMaterial: Aluminum
钢缆材质: 铁
Guy WireMarerial: steel
担心星球大战音效可靠性的学霸们
For the Fellow Scholars who are worried about the validity of these Star Wars sounds,
我知道你就在屏幕前 一定要看完这个视频哦
I know you’re out there, make sure to watch the video until the end.
论文作者提出了一个偶极子模型来做出这些模拟
The authors of the paper proposed a dipole model to create these simulations.
偶极子通常用于近似物理学中的电磁场
Dipoles are typically used to approximate electric and magnetic fields in physics,
在这个例子中 看到它用于声音合成真的很令人惊讶
and in this case, it is really amazing to see an application of it for sound synthesis.
举个例子 在大多数情况下 这些物体的声波在二维横切面中通常是对称的
For instance, in most cases, these sound waves are typically symmetric around 2D cross sections
这样就能被偶极子模型有效地描绘出来了
of these objects, which can be described by a dipole model quite well.
同时 从计算方面上来讲 这也相当有效率 能够省去漫长的计算前的步骤
Also, it is computationally quite effective and can eliminate these lengthy pre-computation
这是存在于先前技术中的典型问题
steps that are typically present in previous techniques.
在论文中 同时也与最顶尖技术进行了对比 我们能听得出
There are also comparisons against the state of the art, and we can hear how much richer
新技术模拟的声音更丰富
the sound of this new technique is.
声辐射模型效果
Effect of Acoustic Radiation Model
速率(在条柱尾端)
Velocity(at end of bar)
速率(在条柱中间)
Velocity(at middle of Bar)
全声辐射模型(我们的方法)
Full Acoustic Radiation Model(Our method)
就如你们再清楚不过的
And as you know all too well,
我喜欢那些与我们周边现实世界有关联的论文
I love all papers that have something to do with the real world around us.
原因是对于这些算法 我们有几乎最好的验证方法
And the reason for this is that we can try the very best kind of validation for these algorithms
而这就是 让现实来作为衡量的标准
– and this is, when we let reality be our judge.
录音
Recording
论文中也提供了一些频率图
Some frequency plots are also available
用来和实验室采集的现实世界的声音样本来比对 从而验证算法的输出结果
to validate the output of the algorithm against the real-world sound samples from the lab.
看到我们运用科学来让虚拟世界更加生动
It is really amazing to see that we can use science
这真的很赞
to breathe more life in our virtual worlds.
感谢你的观看和慷慨支持下期再见
Thanks for watching and for your generous support, and I’ll see you next time!

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视频概述

在之前的视频中已经讲过许多模拟物体外观的算法,今天就要来说一下如何模拟出弹性杆的声音

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收集自网络

翻译译者

One静茹

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视频来源

https://www.youtube.com/watch?v=6c2T2cykE_A

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