Wikipedia wrote:Early plasma-speaker designs ionized ambient air containing the gases nitrogen and oxygen. In an intense electrical field these gases can produce reactive by-products, and in closed rooms these can reach a hazardous level.
I hope he's somehow using helium like the article says or he could be in trouble...
Posted: Mon Oct 10, 2011 12:02 pm
by al-xg
I've seen and heard ones with much better fidelity, still only in the treble range but much clearer.
Wouldn't be my choice of music for testing speakers...
Posted: Mon Oct 10, 2011 12:13 pm
by warhead052
Its not a bad speaker, but it could probably use some higher voltage. If you listen to the end of the third video, you can hear the radio broadcast, which would explain the music.
Posted: Mon Oct 10, 2011 7:31 pm
by Technician1002
The one in the video has a bad problem with the jumpy flame. This is causing the location of the sound source to move with the flame. A proper one has a small stable flame that emits the sound.
The moving flame is causing Doppler shift as well as changing the direction the sound is projected resulting in amplitude shifts as the speaker "points" different directions at random times. I've seen much better attempts.
Posted: Mon Oct 10, 2011 8:39 pm
by warhead052
Well, its a first time around, and this is a college student (I think) that made it.
Posted: Mon Oct 10, 2011 10:34 pm
by Zeus
What an electric arc makes is ozone (O<sub>3</sub>) and nitrogen dioxide (NO<sub>2</sub>).
If it isn't an overpowering smell, then you're fine. (You know when it's too strong, believe me.)
A couple of members here know how I intend to exploit that side effect of arcs.
Posted: Tue Oct 11, 2011 12:56 am
by Technician1002
Zeus wrote:What an electric arc makes is ozone (O<sub>3</sub>) and nitrogen dioxide (NO<sub>2</sub>).
If it isn't an overpowering smell, then you're fine. (You know when it's too strong, believe me.)
A couple of members here know how I intend to exploit that side effect of arcs.
If the arc is in air, this is an issue. In a flame with a complex reaction, there is little ozone. The presense of fuel takes care of the Ozone. It is the ultimate Charcoal Filter. I'm not sure about Nitrogen Dioxide.
Posted: Tue Oct 11, 2011 3:18 am
by Zeus
Ozone is produces more by silent discharges, I haven't studied the byproducts of electrical discharges to a great extent, but I do know that NO<sub>2</sub> is produced, an excellent though long topic is here at Sciencemadness.
That's pretty darn cool!