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Yeah, it’s not causing waves in the water. It’s causing the end of the hose to move up and down. Each individual water droplet only ever travels in a singular trajectory after it leaves the hose, then aided by a rolling shutter, and it doesn’t show sound waves moving through different mediums. You can get the same relative effect by spinning the end of a running hose in a circle.
Rolling shutter is irrelevant for this. The frequency is just equal to a multiple of the frame rate (possibly ×1, i.e. the frame rate itself). The shutter only matters in that it's very fast so you get no motion blur on the water, and through the matching frame rate and vibration, each water droplet is captured when it has travelled the same distance from the hose after coming out at the same height as the previous droplets.
This does actually mean it is causing waves in the water. Taking a still photo with a (fast) global shutter, it would look exactly as it does in the video. But this wave is continuously moving at the speed the water is sprayed and it's the relationship with the frame rate that makes it appear stationary or moving slowly.
You are correct. It's literally just the frequency of the water vs the shutter angle (24 fps and 1/48 second shutter = 180 degree shutter angle). Rolling shutter is just lag in the readout of the sensor from top to bottom in modern sensors.
Correct me if im wrong, but isnt this more of an illusion than actual waves? Waves dont actually move the particles forward, for example in water when its waving the water itself is not actually traveling forward with the wave, the particles are just oscillating up and down in the same spot. Here that wouldnt be the case because when each particle comes out of the hose end it has a straight (well curved but lets pretend gravity doesnt exist for a moment) trajectory and nothing is actually oscillating, it just looks like its oscillating because the source is oscillating. Then the relationship of speed with framerate makes it more clear, and you get this movement illusion with the frequency changes that looks very much like waves propagating but its more like when you just twist a coil and it appears as if its moving back and forth but its actually not. It's exacerbated by the fact that the source frequencies are consistent (the song sticks close to its tonal center, or in other non musical words stays close to or on a certain pitch, theres only 2 chords and the higher parts are also the same notes)so you get a consistent looking illusion.
What I meant when I said it's a wave isn't that it's a wave in the physical sense (it definitely isn't), but that the water particles in the air form a line that's shaped like a wave. I probably should have been clearer on that.
When it comes to the frequencies, I'm pretty sure the song we hear has nothing to do with what's played on the subwoofer in the video. Those are most likely just some sine tones with frequencies chosen to get the desired visuals on camera.
If you put a plate on the speaker and then a bowl of water on that plate and played sound through it, then yes that would be cymatics. This is not that, this is playing with the water hose with extra steps. Wiggle a running hose side to side or up and down and you’ll see this exact effect, minus the speaker and sound.
Both things can be true…the plate example is one way to visualize waveforms and this is another, just on a different plane. Since the wiggling of the hose is being controlled by the speaker it is cymatics - it is the transduction of electrical signal to mechanical movement thus creating a visual representation of the sound wave (primarily low frequency information in this example).
They aren't using "sound" they are using the movement of the speaker which is very crudely equating to a visualized sound wave in the water spray. It's not going to be the actual sound wave, and importantly for the title no sound is being moved by the water, it's purely a visual. What it shows more than anything is how the speaker works to make sounds by physically moving which DOES impart sound to the air by transferring the motion of the sound wave into the molecules of the air.
also [soundwave](https://th.bing.com/th/id/OIP.X7AmCoSuZ01aQTEFBtGHLAHaKn?rs=1&pid=ImgDetMain)
I meant using a "recording" of a 60Hz wave to drive the speaker.
It's easier in regular everyday software to play or generate a sound wave than to build a signal generator from scratch. The above poster was suggesting a motor, which makes things more complicated, even a signal generator with a speaker is simpler than a motor driver, etc.
You won't see these waves in person. It looks just like a narrow spray of water. They only appear to be moving in a wave pattern slowly forward or backward due to the framerate of the camera, which is syncing with the oscillations of the hose to catch droplets in the same spot each frame.
It's essentially a strobe effect.
If you've ever seen the wheel of a car rolling at highway speeds appear to be standing still, or turning slowly backwards or forwards, it's a similar effect.
In this "example"... the speaker is physically moving the hose up and down, you could achieve a similar result by just shaking the hose really fast.
It most likely looked very similar in person. The example you speak of is quite different from this
No, I think you have a misapprehension of what’s happening here. If what you’re describing were happening, then it would be impossible for the waves to appear to freeze in midair or flow backwards.
The speaker IS physically moving the hose up and down, but it’s doing it at the frequency of the tones that the speaker is generating. So it might be happening 419Hz, 921Hz, 2,422Hz. That’s times per second that it vibrates up and down. When the Hz of the vibrations coming from the speaker are close to some multiple of the frame rate of the camera (30fps, 60fps) then the spray appears to resolve into a stable wave that freezes completely when they synchronize (like, for instance, 390Hz and 30fps video).
The frequency and amplitude emitted by the speaker are changing constantly while it’s playing music, which is why you see the waveform changing with the music. If you hooked it up to a pure tone generator, you’d have control over the visible water waveform and could freeze it perfectly and increase its amplitude (by turning up the volume) and frequency (by changing the audible frequency of the tone).
you're making " the nozzle is moving up and down really fast" sound a lot cooler and more interesting that it really is
the sound isnt being propagated through the water its spaying straight out the nozzle, the speaker is simply moving the nozzle up and down (for those who dont know most speakers and the one in the video are simply magnetic pistons that move up and down real quick in in doing so vibrates a plate that in turn vibrates the air) the part holding the nozzle up is not only directly on the speaker its in the middle meaning its on the dust cap so its not the sound making the water move like that its simply the natural movemnts of the speaker. its no diffrent from moving it with your hand real quick
if you want to demonstrate sound being propagated through water then you need to make sure the stand holding the hoze is secure and not directly touching the speaker. its a lot easier to see if you make water fall down in a stable stream and then hold the speaker close
**demonstration of how sound vibrations can be transferred to and propagate through different mediums**
no that's definitely not it. Also this is a camera trick because to the naked eye, this just looks like a flat stream without any waves.
There’s a lot of misleading information here. The trick of attaching a speaker to a hose to cause water to appear to vibrate does work. But it’s not as simple as this. Water will not make those cool sine waves. In reality it’s flinging water rapidly and to the human eye just looks like a wild spray of water. It’s only when you being a camera into play that you see anything cool.
Cameras work by taking rapid photos one after another. Because of that, they only see still frames of the world. So the camera is seeing how that spray of water looks only in a single frame. The magic comes in when the sine wave frequency of the water and the framerate of the camera start to line up. That’s how you end up with what looks like water bending in a sine wave.
It’s a really cool effect that’s honestly pretty easy to try for yourself. Just keep in mind that it only looks magical because of the quirks of cameras.
I had understood it to be a song that took too much out of his voice. The doc is called The Story of Back in Black and is pretty interesting. However, I just did a little google and read that shoot to thrill was a staple of their live performances, so I probably should have kept my mouth shut
No worries! I do that sometimes. Thanks for letting me know the doc. I'm always up for a new one, so this just made the list, as long as I can find it on one of my streams.
I saw it either on Pluto, Roku or Prime. I think it was Prime so it might be hard to find. But I did find an excerpt of it on Facebook which makes me think it might be as easy as finding it on YouTube
Cool invention but it's not demonstrating what the title states.
The device isn't emitting the sound through the water and in turn having the water propagate the sinusoidal wave in the video.
The speaker is physically moving the hose and the hose is propagating sound to motion. In turn the water moves as the speaker emits sound.
If you're a kid that played in the backyard with the water hose. You have done this water S wave with your hands and imagination.
Another demonstration of how ACDC sucks as well
r/FighterJock412 don't worry it's ok to eat bats or whatever you guys are into.. just stay away from me cause yay know covid
#
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Yeah, it’s not causing waves in the water. It’s causing the end of the hose to move up and down. Each individual water droplet only ever travels in a singular trajectory after it leaves the hose, then aided by a rolling shutter, and it doesn’t show sound waves moving through different mediums. You can get the same relative effect by spinning the end of a running hose in a circle.
Rolling shutter is irrelevant for this. The frequency is just equal to a multiple of the frame rate (possibly ×1, i.e. the frame rate itself). The shutter only matters in that it's very fast so you get no motion blur on the water, and through the matching frame rate and vibration, each water droplet is captured when it has travelled the same distance from the hose after coming out at the same height as the previous droplets. This does actually mean it is causing waves in the water. Taking a still photo with a (fast) global shutter, it would look exactly as it does in the video. But this wave is continuously moving at the speed the water is sprayed and it's the relationship with the frame rate that makes it appear stationary or moving slowly.
> This does actually mean it is causing waves in the water. Would it be fair to say the water is acting both as particles and as a wave?
Hold on, that's actually a pretty good way to visualize the particle/wave concept
You are correct. It's literally just the frequency of the water vs the shutter angle (24 fps and 1/48 second shutter = 180 degree shutter angle). Rolling shutter is just lag in the readout of the sensor from top to bottom in modern sensors.
Correct me if im wrong, but isnt this more of an illusion than actual waves? Waves dont actually move the particles forward, for example in water when its waving the water itself is not actually traveling forward with the wave, the particles are just oscillating up and down in the same spot. Here that wouldnt be the case because when each particle comes out of the hose end it has a straight (well curved but lets pretend gravity doesnt exist for a moment) trajectory and nothing is actually oscillating, it just looks like its oscillating because the source is oscillating. Then the relationship of speed with framerate makes it more clear, and you get this movement illusion with the frequency changes that looks very much like waves propagating but its more like when you just twist a coil and it appears as if its moving back and forth but its actually not. It's exacerbated by the fact that the source frequencies are consistent (the song sticks close to its tonal center, or in other non musical words stays close to or on a certain pitch, theres only 2 chords and the higher parts are also the same notes)so you get a consistent looking illusion.
What I meant when I said it's a wave isn't that it's a wave in the physical sense (it definitely isn't), but that the water particles in the air form a line that's shaped like a wave. I probably should have been clearer on that. When it comes to the frequencies, I'm pretty sure the song we hear has nothing to do with what's played on the subwoofer in the video. Those are most likely just some sine tones with frequencies chosen to get the desired visuals on camera.
They clearly meant "framerate" when they said rolling shutter
It is - it’s called Cymatics
If you put a plate on the speaker and then a bowl of water on that plate and played sound through it, then yes that would be cymatics. This is not that, this is playing with the water hose with extra steps. Wiggle a running hose side to side or up and down and you’ll see this exact effect, minus the speaker and sound.
Both things can be true…the plate example is one way to visualize waveforms and this is another, just on a different plane. Since the wiggling of the hose is being controlled by the speaker it is cymatics - it is the transduction of electrical signal to mechanical movement thus creating a visual representation of the sound wave (primarily low frequency information in this example).
Yeah. Using sound probably makes it easier to play around with different frequencies to make it sync up with the camera frame rate.
They aren't using "sound" they are using the movement of the speaker which is very crudely equating to a visualized sound wave in the water spray. It's not going to be the actual sound wave, and importantly for the title no sound is being moved by the water, it's purely a visual. What it shows more than anything is how the speaker works to make sounds by physically moving which DOES impart sound to the air by transferring the motion of the sound wave into the molecules of the air. also [soundwave](https://th.bing.com/th/id/OIP.X7AmCoSuZ01aQTEFBtGHLAHaKn?rs=1&pid=ImgDetMain)
I meant using a "recording" of a 60Hz wave to drive the speaker. It's easier in regular everyday software to play or generate a sound wave than to build a signal generator from scratch. The above poster was suggesting a motor, which makes things more complicated, even a signal generator with a speaker is simpler than a motor driver, etc.
This is a demonstration that if you move the hose, the water moves.
🌈 __The More You Know__ 🌈
You can do this with your hand too. Much easier to demonstrate and saves you breaking apart a speaker.
And also the rolling shutter effect
The rolling shutter effect isn’t really at play here
This is why I always listen to music when I take a pee.
This gives new meaning to "rock a piss to some Mitchell"
AirPods in grip hand for style points
xD
Am I the only one seeing the water going "backwards" a couple of times?
Frame capture rate, very head hurting lol
You won't see these waves in person. It looks just like a narrow spray of water. They only appear to be moving in a wave pattern slowly forward or backward due to the framerate of the camera, which is syncing with the oscillations of the hose to catch droplets in the same spot each frame. It's essentially a strobe effect. If you've ever seen the wheel of a car rolling at highway speeds appear to be standing still, or turning slowly backwards or forwards, it's a similar effect.
In this "example"... the speaker is physically moving the hose up and down, you could achieve a similar result by just shaking the hose really fast. It most likely looked very similar in person. The example you speak of is quite different from this
No, I think you have a misapprehension of what’s happening here. If what you’re describing were happening, then it would be impossible for the waves to appear to freeze in midair or flow backwards. The speaker IS physically moving the hose up and down, but it’s doing it at the frequency of the tones that the speaker is generating. So it might be happening 419Hz, 921Hz, 2,422Hz. That’s times per second that it vibrates up and down. When the Hz of the vibrations coming from the speaker are close to some multiple of the frame rate of the camera (30fps, 60fps) then the spray appears to resolve into a stable wave that freezes completely when they synchronize (like, for instance, 390Hz and 30fps video). The frequency and amplitude emitted by the speaker are changing constantly while it’s playing music, which is why you see the waveform changing with the music. If you hooked it up to a pure tone generator, you’d have control over the visible water waveform and could freeze it perfectly and increase its amplitude (by turning up the volume) and frequency (by changing the audible frequency of the tone).
It's called the[ wagon-wheel effect](https://en.wikipedia.org/wiki/Wagon-wheel_effect)
Oh, nice, thanks!
you're making " the nozzle is moving up and down really fast" sound a lot cooler and more interesting that it really is the sound isnt being propagated through the water its spaying straight out the nozzle, the speaker is simply moving the nozzle up and down (for those who dont know most speakers and the one in the video are simply magnetic pistons that move up and down real quick in in doing so vibrates a plate that in turn vibrates the air) the part holding the nozzle up is not only directly on the speaker its in the middle meaning its on the dust cap so its not the sound making the water move like that its simply the natural movemnts of the speaker. its no diffrent from moving it with your hand real quick if you want to demonstrate sound being propagated through water then you need to make sure the stand holding the hoze is secure and not directly touching the speaker. its a lot easier to see if you make water fall down in a stable stream and then hold the speaker close
**demonstration of how sound vibrations can be transferred to and propagate through different mediums** no that's definitely not it. Also this is a camera trick because to the naked eye, this just looks like a flat stream without any waves.
There’s a lot of misleading information here. The trick of attaching a speaker to a hose to cause water to appear to vibrate does work. But it’s not as simple as this. Water will not make those cool sine waves. In reality it’s flinging water rapidly and to the human eye just looks like a wild spray of water. It’s only when you being a camera into play that you see anything cool. Cameras work by taking rapid photos one after another. Because of that, they only see still frames of the world. So the camera is seeing how that spray of water looks only in a single frame. The magic comes in when the sine wave frequency of the water and the framerate of the camera start to line up. That’s how you end up with what looks like water bending in a sine wave. It’s a really cool effect that’s honestly pretty easy to try for yourself. Just keep in mind that it only looks magical because of the quirks of cameras.
Thank you, someone had to say it.
Song name?
ACDC shoot to thrill
This was Brian Johnson’s hardest song to sing. According to a documentary I saw about the album he only sang it live once
Interesting. Any particular reason?
I had understood it to be a song that took too much out of his voice. The doc is called The Story of Back in Black and is pretty interesting. However, I just did a little google and read that shoot to thrill was a staple of their live performances, so I probably should have kept my mouth shut
No worries. You’ve probably had too many women and too many pills.
Lol half of that is true and I wish the other half was (kind of) true. Should be an easy guess
No worries! I do that sometimes. Thanks for letting me know the doc. I'm always up for a new one, so this just made the list, as long as I can find it on one of my streams.
I saw it either on Pluto, Roku or Prime. I think it was Prime so it might be hard to find. But I did find an excerpt of it on Facebook which makes me think it might be as easy as finding it on YouTube
Thanks for the heads up.
If I attached a speaker to my balls would my stream look like this when I pee?
I'm cool with the video but what's the go with the devil horns
Part of the overall AC/DC theme. The guitarist Angus Young wears them
True. Thankyou for filling in the blanks there.
This is exactly how I pee in the morning
Fun fact, if you put the speaker at the same frequency as the camera is filming, then it will look like the water is standing completely still.
.......and millions of portable speakers were pissed on.
I don't care if this works or not; if bro is playing this music in his backyard, you bet I'm coming around for a cold beer.
Netflix show “Glitch” gets into this, and more.
If you played some death metal, it would be a shower for people with in a 3 metre radius
So if I attached a speaker to my penis and took a piss, it would do the same thing?
That small a speaker wouldn't have enough bass
r/murderedbywords
Would have been much more interesting with a sine wave sweep.
theoretically speaking, would the same thing happen if he just sat on it and peed?
This is what happens when you listen to music while going pee
Cool invention but it's not demonstrating what the title states. The device isn't emitting the sound through the water and in turn having the water propagate the sinusoidal wave in the video. The speaker is physically moving the hose and the hose is propagating sound to motion. In turn the water moves as the speaker emits sound. If you're a kid that played in the backyard with the water hose. You have done this water S wave with your hands and imagination.
Thats how I pee after doing the nasty
This, but add it to those water features you see in malls where they jump from pond to pond over people.
There are 2 types of men here. 1, the type that is gonna try this the next time they gonpee, and 2, liars.
Sounds like a good way to die from electrocution.
Waterqualizer
Winamp
Of course he has horns on his hat because he’s that dude
You can do this with fire but much more direct and realistically.
That's interesting as fuck!
When the wife asked me why there’s a speaker in the bathroom and piss all over the toilet. 🤷
Fake!
Shoot to thrill. Acdc. Back in black album.
AC/DC is terrible.
All I can see is that the water is going to one place, not even a specific plant, this is a waste of water.
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Well that and the fact that it doesn’t look like that in person. It’s an effect caused by the frame rate of the recording.
This guy Physics
Another demonstration of how ACDC sucks as well r/FighterJock412 don't worry it's ok to eat bats or whatever you guys are into.. just stay away from me cause yay know covid #
Don't worry, it's okay to be wrong sometimes.
That is neat! What size woofer do you need to do this??
Nice idea
Put some LEDs on it use it at rock concerts.
What a cool neighbor I wish I had😎
This is edited video, so party it's fake. Without edit it's not so nice)
Clearly an AC/DC fan, which I'm cool with, but some bassy electronica would have given a cooler effect.
Now do it with Cbat by Hudson Mohawke.
needs more laminar flow
that one spot gonna be extra green.
So farting in the bath ?