請問這種水流是怎麼做到的？

01-03

http://ww2.sinaimg.cn/mw690/c2adb464tw1en4ec3zrlcg209q05hx6p.gif
如圖，水流直接折了。那個是什麼裝置呢？

高音頻

出水口在抖動，但因為抖動頻率與攝像機採樣頻率一致所以看不出來，用眼睛看很容易看出問題。

@毛小可的回答是對的。

一言以蔽之，就是利用了相機的「視覺暫留」現象。

簡要地翻譯一下…

For this project you"ll need:
A powered speaker
Water source
Soft rubber hose
Tone generating software
24 fps camera

Tape.
【材料：揚聲器、水管、膠帶、軟管、可按設定頻率發聲的軟體、24fps的相機】
Run the rubber hose down past the speaker so that the hose touches the speaker.
Leave about 1 or 2 inches of the hose hanging past the bottom of the speaker. 【令水管和揚聲器接觸並貼好】
Secure the hose to the speaker with tape or whatever works best for you. The goal is to make sure the hose is touching the actual speaker so that when the speaker produces sound (vibrates) it will vibrate the hose.【所以揚聲器播放音頻便可以同頻率振動水管】
Set up your camera and switch it to 24 fps.
【設置相機為24fps，播音、放水】
The higher the shutter speed the better the results. But also keep in the mind that the higher your shutter speed, the more light you need. Run an audio cable from your computer to the speaker. Set your tone generating software to 24hz and hit play.Turn on the water. Now look through the camera and watch the magic begin.【在相機里就能看到神奇的效果了】

If you want the water to look like it"s moving backward set the
frequency to 23hz. If you want to look like it"s moving forward in slow motion set it to 25hz.
【23Hz的音頻可讓水流在相機里有倒流效果，25Hz則相反。】
Have fun!

==============以下不是真相====================

駐波 _百度百科

聲懸浮為什麼能讓水浮在半空中？

看起來和這個有關。

------------------------------------------------

看得見的音樂-原創視頻

此視頻的某些「特效」也使用了這種原理。

圖中水流的左邊有一個大的揚聲器，

操作的是揚聲器的音量旋鈕。

注意到水流的轉折點上出現了短暫的滯留，

是因為聲壓形成了一個個勢能極小的勢阱。

水流就"掉進"裡面了。

YouTube到微博到知乎的搬運鏈已經形成了嗎。

轉載署名。原作者https://www.youtube.com/user/brusspup

還沒有人回答如何做……

搬運要徹底

For this project you"ll need:

A powered speaker
Water source
Soft rubber hose
Tone generating software
24 fps camera
Tape.
Run the rubber hose down past the speaker so that the hose touches the speaker. Leave about 1 or 2 inches of the hose hanging past the bottom of the speaker. Secure the hose to the speaker with tape or whatever works best for you. The goal is to make sure the hose is touching the actual speaker so that when the speaker produces sound (vibrates) it will vibrate the hose.

Set up your camera and switch it to 24 fps. The higher the shutter speed the better the results. But also keep in the mind that the higher your shutter speed, the more light you need. Run an audio cable from your computer to the speaker. Set your tone generating software to 24hz and hit play.Turn on the water. Now look through the camera and watch the magic begin. If you want the water to look like it"s moving backward set the
frequency to 23hz. If you want to look like it"s moving forward in slow motion set it to 25hz.
Have fun!

還需要一台攝像機。肉眼是看不到這種效果的。頻率~~

CYMATICS—在線播放

搞物理的玩音樂後……請欣賞！！看完後感覺就不會單問水流是怎麼形成的了。。。

原理上面說了，那說說裝置。

你需要：

-揚聲器

-橡膠管
-音頻發生器軟體(tone generating software)
-製造 24 赫茲正弦波

更多內容可以關注這個視頻

https://www.youtube.com/watch?v=uENITui5_jU

or https://www.youtube.com/watch?v=_ytAq9sOXMo

再發一個有趣的視頻

【TOPYS】Mercedes-Benz Experiments：Water視頻

24Hz 聲波讓水流聞之起舞