Sending Sound on a Laser! - The Science of Telecommunication with Mr. G - Part 3
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- Опубликовано: 3 окт 2024
- Craig Beals and Glenn Govertsen from the Mr. G Science Show show how the signal for sound can be sent on a beam of light including how you can build your own laser sound machine. They explain how telecommunications work with different frequencies and pulses of the electromagnetic spectrum to send information across vast distances. This experiment demonstrates how cell phones, remote controls, radios, Bluetooth (and more) work.
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WARNING:
This video is only for entertainment purposes. If you rely on the information outlined in this video, you assume responsibility for the results. As with any experiment, proceed at your own risk.
I remember meeting Mr.G in my first year of teaching a very long time ago. So cool to see him again. Great video.
Thanks, Paul! I too have never forgotten the first time I met Mr. G. We were at MEA in Missoula and he had a copper tube and a magnet - it was my first introduction to Lenz's Law. Thank you for being my inspiration and mentor and for encouraging me to push the limits in teaching and push my creativity on RUclips. I am ready to do some collaborations with Bozeman Science, just let me know when you're ready!
- Which instrument do you play?
- I play laser and the comb
Mr. G is definitely at Level 2 on comb/laser playing!
This is GREAT. I wish more people would take an interest in this kind of stuff. I don't understand how anyone could NOT. Great job. Never stop achieving greatness.
Thank you for the kind words!
I actually suggested this to a friend when we were in highschool as an idea for a physics demo, this was back in 2002, it's interesting seeing other people do the same thing, he started with a torch and a solar panel, if I recall correctly that was his idea, I then suggested using a red laser and the sound clarity was much better due to the focused beam. He just used a microphone to transmit his voice though
Why couldn’t we do cool stuff like this back when I was a kid in science class? Very interesting experiment.
Thank you for the kind words!
Awesome
Reminded me of the old Mr. Microphone commercial.
“ Hey , I’m on the radio ! “
:)
I had forgotten about Mr. Microphone!!
Omg Mr G! I remember watching you on another video website yeeaarrssss ago, like 12 years. Before you were on RUclips. I'm so glad to see you again! I miss your wonderful intros :( please keep making videos 💜
Edit: the website was Metacafe
I shared your comment with Mr. G!
Did this in college, in the 70's. Used a Helium Neon Laser and a Potassium Di-Hydrogen Phosphate crystal and polarizer. Produced brightness modulated signal detected by the photo cell.
That sounds amazing!!
I can see the potential for a new cool sciencey musical instrument! Really awesome!
Wouldn’t it be amazing to have several of these set up and running to the same speaker?! You could probably make some interesting EDM!
@@BealsScience That's a great idea
That would be a synthesizer ;))
I saw a video on you tube of a guy who was shinning a laser through vibrating strings at a photocell as the basis for a tone generator in a homemade synthesizer. It's definitely got potential.
that is awesome ! excellent demonstration Does that mean i can point a laser beam into someones ear and transmit my voice to them?
ha ha ha - voices in my head?
Sometimes I think I hear voices…
But Maybe I will just blame the lasers!
I knew that a laser could be used to make a microphone to record sound vibrations on a window some distance away, but never made the connection that you could "synthesize" sounds from it using physical objects like a comb. This is so cool! My fellow musical mad scientists will love this!
Thanks!!
This definitely needs more views
Thank you for the kind words!
haha, I thought you're going to do long-range eavesdropping via laser reflection from surface vibration.... it's like the same trick as the laser show speaker as before but instead of the laser projected on a wall, it now pointed to a receiver which could detect the vibration of the reflected beam and converted it to sound. This trick could help you listen to someone's speech from far away with just a window reflection
This sounds interesting!
Guess I better start doing some research!
Thanks for sharing!
Did this exact experiment 'bout 30 yrs ago at home at 40' distance except using an amplitude modulated 2000 volt helium-neon gas laser tube... Interesting video, Thx..
Nice work!
I’d love to see this with an AM laser!!
This is beautiful. You guys are the best!
Thank you!!
My mind is blown I’ve always been interested in sending sound via lasers. Tyvm
Thank you for your comment!!
I would’ve got a degree in this field if this guy was my teacher in HS lmao more of yall plz plz plz
Thank you for the kind words!!!
Your channel is always Awesome 😀
And your comments are always Awesome!
Thank you!
Hey Mr. Beal, if you ever need help with this telecommunication series or anything to do with electronics I'd be happy to help you out.
P.S I don't mean to be that guy, but when you are playing the sound with the laser it is actually not turning on and off, instead the ac audio source you wired in series with the with the battery and the laser diode is modulating the voltage going to the laser (making it increase/decrease). This is why the laser is still on when there is no audio, the speaker only moves (makes sound) when there is a change in voltage potential along it's coil.
Please keep making awesome videos and sorry for being "that guy"
-David
I appreciate your offer to help and, as you can see, I need all the help I can get! The reason I have done so many videos with lasers, light and sound lately is that I am always trying to tackle things that I don't know about - I guess I love to learn new things. So, please don't ever hesitate to "be that guy" on my videos - this is how I learn! And, your explanation makes so much sense to me, the idea of the laser turning on and off to make the complex sounds of music perplexed me - but the slight fluctuations in voltage make so much more sense!
Thank you for the comments!
Craig
@@BealsScience No problem, I appreciate your attitude towards learning. Most of my teachers right now would not take very kindly to my comment.
Have a great day,
-David
Your help and suggestions are always welcome here!
Hello to both of you,
I am confused about how the laser is continuously on, cause the paper clip isn't at the location it should be to keep the laser on. Have you made any modifications to the laser pointer? I'll be grateful if you could kindly explain your connection to me.
Cool video concept!
Thank you!
This is a great start. I would suggest researching different types of energy and storing information in energy as a medium of storage vs transmission.
Like a HDD made of light.
Thanks for the tips!
That's not gonna work. The idea of storing data is that the semiconductors in the electronics are locked in such a way such that it will always be 0 or 1. This locking mechanism is using a circuit known as a latch.
In the past, storing data uses a capacitor, where a full capacitor means 1 and empty capacitor is 0. However, capacitor charges depletes over time. Therefore, every hour or so the capacitors (which contains 1) will need to be recharged.
In terms of HDD, they used magnetic field to induce magnetism to a small metal pixel on a metal plate. Then to read the data, a magnetic field sensor is dragged across the metal to read the 0 and 1. As magnetism also disappears over time, it is also required to be recharged, but not as frequently as capacitor, maybe every month or so. This is why SSD is superior to HDD, as SSD uses the latch system, that does not require recharge.
With your idea about light, it would be very expensive to keep a light on indefinitely just to keep a data. Even if we're using luminescent paint to store the data for example, we know that luminescent paint even dims out over time. Therefore you would need to "recharge" it by giving it light again.
I made something like this once and I believe I put an isolation transformer between the audio source and the laser so the power from the laser is not connected to the audio source. It's been a while and I was only experimenting at the time but it worked and I actually have two of those mini amps.
The mini amps are like gold these days!
......fam
This one and the laser disco party are my favorite ones with the MrG. Are you guys doing more videos?
We don't have plans for any more videos, but we may definitely collaborate on more videos in the future! I hope to share more of the Mr G Science Show with the RUclips world!
@@BealsScience that would be cool
Came here from Vsauce3, what a great science channel, will be watching more for sure!
Dan Schaumann I’m glad you stopped by! Thank you for the kind words!
This video was so good!
Thank you!
This is very John Cage, Stockhausen or Throbbing Gristle. They would have loved this.
I had to look them up but now I understand!
It would be really neat to compose something using lasers, light and resonance!
Pretty Cool!
Thanks!!
This is mind blowing, thanks a lot for sharing
Glad you liked it!
Great demonstration! Cant seem to find the the others parts - can anyone provide a link? :)
Which parts are you looking for?
Maybe I can help.
This is really cool. Although I do think it can be misleading or confusing to some the way RF transceivers were presented as being the same as optical devices here.
Compact
disc
30 years ago sending music through a laser .
Cd roms
Sending tons of information :)
Now reinvented 😂
Thanks for watching!
DOPEST VIDEO IN AMERICA RIGHT NOW !
Dopest COMMENT in America right now!!
Eye opener
This is awesome. So, in his way can we send signal to distant locations? also, does it work on invisible lasers? Can this be used to send signal to moon? THe sound should travel much faster than the speed of sound this way
yes and yes but you need a more powerful laser it will also work with sunlight and a flexible mirror
@@jonsouth1545 This can transmit sound much faster than light is something I would have never imagined. Then I remember telephone and wireless internet. But this is pretty primitive technology and easy to setup.
Teacher, your shirt is wrong. The element 79 is "Au" not "Gb", it is Gold regardless.
It could be done to satalite to test it.
An old guy using tech! That is amazing.
He is a great guy, isn’t he?!
Sad you havnt made more videos recently
Thank you!
I apologize that I haven’t uploaded in quite a while. I am working on my education channel right now and have been doing a BIG collab with 2 very large YT channels (their videos will be coming out in a few weeks)!
But, I am still working on more videos for here and hope to have them up in a few weeks.
Could it be possible that the is a device that send speech to your head?
Crazy , thanks for sharing .. not nuts!
Thank you!
Fantastic. Fiber optics led me down this wormhole
Thanks for watching!
Imagine an machine vision assisted version for the vision impaired where they can get everything in the room to say it’s own name.
👍
So basically it's just like how digital audio cables then?
But maybe in an actually audio system they don't use a solar panel as a receiver. Maybe a more sophisticated circuit like a phototransistor (which is a sophisticated solar panel to be fair) connected to a bunch of filters.
You are correct!
How cool is this!
Thanks!
Nice .
Thanks!
I'm not at all surprised that music can be sent over a laser beam, but I *_am_* surprised that a simple solar cell has a high enough frequency response. How is the laser modulated? Is it simple analogue amplitude modulation, or does the audio cause the laser beam to be switched to produce a mark-space modulation?
That is a great question! I don’t have an answer for you but I will see if I can find more info.
@@BealsScience I hope you can find an answer. I ordered 3 lasers and a couple of phototransistors today to give it a go. I was intending to make a mark-space cycle 30k times per second, which, according to Mr. Nyquist, should give me up to 15k audio - not that the experiment requires high quality - it is just an experiment - not an application as such - I just want to see if it can be done, and incidentally impress and interest my 9-year old grandson.
The lasers are cheapies, and at the moment, I have no idea whether they can be switched on and off at that rate. That's why I opted for a phototransitor as the receiver instead of a solar cell. I may be wrong, but I think it will be quicker.
When I was at college almost 60 years ago, we had an open day in which there was a demonstration of music being carried on a light beam - which people could test by blocking the beam with a hand - but in reality, the music got to the receiver through wires, and the beam just switched it on and off - a great con - but it looked convincing!
thats so cool
Thank you!!
This is cool
Thanks!
finally, a replacement for big bulky speakers in my projects.
What are you making?
@@BealsScience idk, ill just make super tiny keychains with lasers.
Would have liked to see how well it does with the lights off in the room.
👍
I thought blue tooth was radio waves not light waves so his last comment regarding the students is in correct or am I wrong
Oftentimes we generalize “light” as all wavelengths of the electromagnetic spectrum. Radio waves are a long wavelength “light” that travel at the speed of “light”.
Very cool.
I guess this is similar to how cable internet works: on and off, ones and zeros, light and dark, binary sent over cables.
Binary is of course the language of computers.
So anything you like is sent.
Exactly!
Pretty much all modern communication and media uses this in some form or another!
I'm watching this movie on Prime called The Voyeurs. They listened in on their neighbors across the street using a mirror and laser. Is that possible?
It is! iLife you had a setup like this you can shine the laser at a window and let the reflected light hit the solar cell. The window vibrations from the panes of glass will allow the transmission of sound.
I think its fanatastic - if you only knew - congrats
Thanks!!
So now humanity should direct antennas to detect lasers from other galaxies to hear what they were trying to tell us for billions of years 🤓👽
I do believe we have satellite dishes looking to detect signals like this from off in the universe!
Buenas soy de España. Me gustaría ponerme en contacto con usted. Gracias
@@BealsScience but I think they capture radio, not lasers.
@@moreno.paranormal742 claro que si, como se puede hacer sin que nadie copie mi email?
I think you are correct. I am not aware of any programs looking for visible laser light.
#Bluetooth and #WIFI are radio-waves not light-waves, same as a remote control for the tv, they are infrared light which is part of the visual spectrum, slight slip up and still a cool project to teach young minds.
It's all light. Radio and infrared are just higher and lower wavelengths of light that our eyes can't see.
Radio waves are also light waves.
Great video but can you explain how emitter works laser gets voltage from computer without amplifier?
The laser emitter is just being modulated by the signal coming from the computer. The amplifier is boosting the modulated signal at the speaker.
@@BealsScience If the computer only modulates the laser, what is keeping the laser on? And how does the computer modulate the laser beam? Have you added something to the laser circuit? You didn't mention any of that in your video. Thanks!
This is indeed amazing :0
Thank you!!
If light can carry information I assume matter thrown out from a black hole can carry information too
Hi, can i make this laser to bounce off walls and make sounds, or this would only be achieved by parametric speakers?
I am not sure.
I’d love to know if it works. If you ever they it, let me know!
Could you use this to make goggles to see microwaves?
I’m not sure but it would be amazing if someone could make them!
Can you split the laser into quantum entangled pairs then broadcast one of the beams to a receiver / dish ect and the other beam through a boze-Einstein condensate.
If quantum entanglement is true then once the signal is found to match the signal that has traveled 10 minutes through space should be quantum entangled with the particle exiting the condensate allowing quantum computing with Mars.
Ofcorse testing could be done in a lab.
Super Cool!
Thanks!!
What happens to laser beam if it is an ultra sound or Infra sound???
Great question! I haven’t tried either of them.
His face at 4:47 is me the whole video 😂
Fantastic!
Mr G is awesome, isn’t he!!
What's the Resister value?
Can you kindly explain how your laser in powered? I understand you're modulating your laser, but how is it powered, without the paper clip being positioned on the laser clip.
The power is coming from the battery. The connection to the computer is toggling (and modulating) on and off with the coding of the music track.
@@BealsScience Thank you so much for getting back to me. I'm a teacher and would love to show my students this amazing experiment but I'm still having problem understanding how the laser is being powered. If its been powered by the battery, shouldn't you put the paper clip on the laser's clip (which needs pressure) in order to turn ON the laser? I'm very sorry to take your time on this. THANK YOU!
@@sfardadthis laser turns on when the lapel clip touches the metal tube of the laser (it completes the connection for the battery).
So, you can replicate this with a laser diode and a watch battery if you can’t find a laser like this one.
Does that help?
@@BealsScience thank you for getting back to me. I understand how the laser circuit completes and turns on, what I do not understand is circuit you're using to "modulate it" while its on using batteries.
How can I use a laser pointer that uses a button to turn on/off and not the pen clip like what you used? I have a similar experiment to this, but would love to try using a laser instead. Thanks for the help!
Love from India🙏🙏
Thank you!
If you have 2 lasers, and connect a electrical power source + to one laser, and - to the other laser will you get a voltage potential across the 2 laser beams? If it does please let me know. Thanks
Dang I'ma buy one of these and when someones in my home they enter I would know where there at
Good idea!
can you add a link with the components you used for this video?
Here is a link to all of the needed components. I hope that helps!
www.bealsscience.com/post/2019/02/06/sending-sound-on-a-lightwave
Laser and moon and sun can be cheapest way for international internet
Its amazing
Thank you!!
I would like to study this more in-depth. What would I research to find the right books? I'm not really sure what the field is exactly. I suppose it would be signals and signal processing?
I would like to know more as well. I don’t know if any books but if I find anything I will reply here to let you know.
If you find anything maybe you can let me know?
Sir please tell how to send radio waves without any laser is it possible ??
What about a special infrared light and sensor that gets broken by CO2 and not other gases?
If it's well shielded from solids and other lights, will it only pick up your aerophone (like how a magnet only picks up your guitar strings)?
Tuesday, May 2, 2023 CE, 19:59 EDT
Great idea! :) Been trying the set-up working very well, nice to experiment with. The only thing I can't do is make the audio connection with a laptop or smartphone? The 3,5mm to RCA doesn't trigger the laser to go on, it just stays off. Am I missing something? I clamp on at the end, and the other in the middle, and don't turn on the laser manually.. hmm!
It is hard to know what could be causing that to happen. Sometimes I have to make sure that my alligator clips are not touching another part of the RCA plug because that will short the signal. Also, you have to make sure that the alligator clip is clamped on the pin on one side and the outside rim on the other (you may have to switch them if it is not working). When you have it set up correctly, and the 3.5mm is plugged into a computer or phone, the laser light will remain on.
@@BealsScience Thanks for the answer! Turns out it was because I was using a slightly different laser, with a on/off button not in the 'clip'. So had to find another way to control the conduction, then it worked!
I wonder how far you could take this.. possibly even miles with a decent laser placement.
I've wanted to test the distance too! But, I need to find a laser with enough power and a way to modulate the signal. Maybe some day down the road I will get it put together!
@@rydersongs How did you control the conduction here? I've been searching and only found to connect to the spring and the outter casing of the laser. Do you use a resistor? Will the computer/phone power the laser on this way?
what type of laser is required for the experiment if not working with on off laser?? please reply currrently working on this
Does it work with blue beam laser?
I haven’t tried it with blue but it should work!
Wow! Question, a laser shot through space(straight line) is moved in a swinging circular pendulum fashion. (The pendulum system turned sideways)
And a laser that can “push.” Also, a craft was in the center of the elliptical ovals. And also receiving pushing lasers. From a side view perspective the craft would be in a tunnel. And if the craft projected the lasers to continue the straight line for travel. Would this create ... something? (Fast travel, debri free travel)
Total budget?
Bluetooth is radio waves, maybe you are thinking of IR remotes which is infrared light.
cool~!
Thanks!
now I had a question.
this signals can go in vacume chamber. but the speed of transmitting sound via laser is the same as light speed? or less?
Same as light speed
How far away are you able to do this? I’m assuming that would depend on the strength of the laser and the sensitivity of the solar cell due to the intensity of the laser dropping off at the inverse of distance squared?
I haven’t tested it beyond my classroom so I am not sure how far. But I agree that the strength of the laser and the quality of the solar cell will definitely be a factor. Likewise any ambient light and the quality of the amplifier will have an effect as well.
If I ever get around to testing distance I will share the results.
Thanks for watching!
Yes I agree that's why I think it'd be best to do another test in the dark In a very flat area say a field or something like that maybe even an airport runway strip if you could get allowed and set up. And just see how far you can go with it.
hi, i have a question, I did the project, the first part came out, but when I connect the cables to the computer to transmit music, it doesn't work, what do I do?
I am glad you got (part of it) to work! It is hard for me to troubleshoot without knowing your setup. Are you using the same lapel pen laser that I've got?
@@BealsScience hi, i was using a diferent one, however i found another laser and i add other things for it, finally it funcitons! thanks
@@MariaA-tk9ie I am glad to hear you got it to work!
Awesome 😎
👍
This is all old technology. If some one know the cinema spools. In print strip / reel has at right corner sound track in which light passes through and in front a solar cell catches that waves of light and then pre-amplifier and power amplifier produce audible sound as it is recorded.
How to share Internet with laser
A taser shocking spot has also been experienced
How can I get this kit?
I’ve got a supplies list on my website that you can use to find everything you need.
www.bealsscience.com/post/2019/02/06/sending-sound-on-a-lightwave
I hope that helps
Love it
Thank you!
Can you send a picture through the system?
Some people have commented that it is possible to send pictures but I haven’t tried it yet. It is on my list though!
Thx for the answer.. yeah, i think you can do it...
i can do that with a transistor and an led.
👍
Thus fiber optic transmission
👍
Bluetooth uses radio waves, not a sound wave. But rest of the video is amazing. Thanks!
It's the same basic concept. The bluetooth radio signal and the laser beam are two examples of a carrier wave. In the case of the laser beam, the amplitude (think brightness) of the carrier wave is being modulated. Radio signals can be modulated the same way. Radio is just a higher frequency of light that we can't see with our eyes.
Another cool idea would be to send an image over laser via a Slow Scan TV App like (SSTV Encoder)
I have to admit that I had to look up SSTV after reading your post and it has definitely piqued my interest! Do you have suggestions for how we could try to send an image using our laser setup?
@@BealsScience you could connect one phone to the transmitter with the SSTV encoder app and have the other phone (with the decoder) close to the speaker so the app can pick up the sound. Here's the links to the two apps I use. *I first found out about this while researching if it was possible to send images over walkie-talkies.
SSTV Encoder
play.google.com/store/apps/details?id=om.sstvencoder
SSTV Decoder
play.google.com/store/apps/details?id=xdsopl.robot36
I love this! Thank you for sharing! I will let you know if/when I get it to work!
@@BealsScience you're welcome, good luck
How fiber optic light different from laxer ??
That is a great question. I don’t actually know if data transmission on fiber optics is considered “laser” light or not.
that is so cool, i want to to make it at my place, just curious, is that solar cell the normal solar cell? will the ouput voltage from solar cell too high and cook the amplifier? any suggestion?
I don’t know the output capability but you won’t be able to generate enough voltage from the laser to fry your amp. So, any cheap solar cell should work!
@@BealsScience thx for the comments, i just made a try by connecting a 10k resistor and a 5v solar panel together in serial and hook up to my little speaker, it works great with green laser, red laser is kind of weak sound possible because the solar panel is more responsitive to green one.
Awesome!