Transfer sound using light
Why use Wi-Fi when you can transmit an audio signal using a laser pointer or LED? 
Login to rate this video.
Embed this video
Send to a friend
This video has, amongst others, been embedded on b00red.com (more info).
Comments
25 comments posted so far. Expand all comments Login to add a comment.
41 
Why do ppl have to post just to say its worthless? that's just retarded.
its an interesting experience and its not made to be useful.
29
i think if it can only work with a line of site and he only has it 5 meters away. I think its cheaper to buy a 5 meter 3.5mm jack male to male cable. Rather than getting 5 croc cables, a resistor, laser pointer and 2x 3.5mm plugs.......
31
6. Comment rated too low. Show this comment Mix 4 years ago
i know a better way to get sound/music, just press play on your mediaplayer...^^ don't get the point of this...
20
8. SixaxisDualshock 4 years ago
I get the point of this, but [url=http://www.hak5.org/]Hak5[/url] did this like over a year ago or something.
1
You could set up a wireless network with infra-red light that would not have free riders. This is a very basic application of what is a promising way to send information with a degree of broadcast control.
11
Very cool. He's modulating the audio signal in the visual spectrum. Forget gigahertz, this guy is working at 500 terrahertz.
1
Made this one years ago for Physics. It's nice to make it yourself but not very usefull
But I read that it should also be possible to hear people talk in another room when pointing the laser at a window and catching the reflecting bundle... because when someone is talking there it should make the glass tremble a little bit 
unfortunately I hadn't time to try it... 
4
Nothing new about this. I've been using optical wireless headphones for over a year.
In case you don't know you can buy them almost anywhere, the only difference is that they work with a UV LED, so that as to reduce interference from other light sources.
1
Sony released a TV that had Wireless Infrared Headphones Way back in the early 90s
It's really cool stuff
37
23. nooitaf (admin) 4 years ago
this gets very interesting at the prices you have to pay nowadays for very strong lasers.. the simplicity is just amazing! with 8 lasers you could actually transit dolby7.1 .. woow 
.. and even if you could buy a cable thats cheaper .. a laserbeam just looks awsome compared to any cable out there!
Go Laser, go laser !
(41 votes)
-2
1. Comment rated too low. Show this comment BigBang 4 years ago
Uhm yeah... place the laser on a table in 3m distance to the opto transistor, adjust it, kick the table, and adjust it again... and again... every single time a part moves like 2cm.