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What shape is the air being pushed away from a speaker?

KillerCharlie said:
Think about it... #1 wouldn't make sense.
Click to expand...

You're right. I was thinking at the level right near the speaker. That close wouldn't it start out the shape of the speaker and then would go convex? I guess it wouldn't probably really matter?

A second question, what about running air perpindicular to the speaker over the speaker while its operating, what would that do to the air?

I was just thinking about using say a speaker to effect the airflow around an object (say a car or large semi-truck), and was trying to visualize some different things. I was thinking how, its well known that putting dimples would help airflow, but what if you also made them speakers. Would it be possible to push the air into a more aerodynamic shape? Certainly it wouldn't be that simple (extra weight alone, as well as the added noise would be issues which could very likely completely negate the benefits). Energy needed to power them, the space they'd take up (unless you made them clear it'd cause visability issues which would then need cameras and more electronics to compensate for). Maybe there's other speaker designs that would be better suited?

A further thought. Say, on the Prius with the optional solar panel roof. Is it possible to make solar panels convcave? Turn it into a speaker, where it uses the electricity it gets via solar to power itself as the speaker mechanism? Again, this wouldn't be practical, but just something that popped into my head. Er, I guess I'm meaning each solar cell that makes up the panel (not the whole panel as the concave shape would be too large.

Then again, what if you could dimple the panel and then have the whole thing extrude like you'd need for the speaker. Of course, I'm not sure how this would impact air pressure (wouldn't as it moves inward, pull air toward it?).
 
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More like this:
wave.png
 
I would think choice 1 is closest, but the shape of the air would be flatter than depicted. Also, the air wouldn't be constantly pushed away from the loudspeaker. If you examined the air next to the speaker you would find that it oscillates.
 
air is a fluid, and therefore takes the shape of its container. the shape of the wave produced by a speaker depends on a lot of things, but is concave with respect to its origin.
 
Maybe you could put your speaker in a large mold, and pour/set Jell-O around it. Once it solidifies, play some music, and the sound waves ought to come right through the gelatin where you can see them.

Then get back to us on what you see! :sneaky:
 
darkswordsman17 said:
You're right. I was thinking at the level right near the speaker. That close wouldn't it start out the shape of the speaker and then would go convex? I guess it wouldn't probably really matter?

A second question, what about running air perpindicular to the speaker over the speaker while its operating, what would that do to the air?

I was just thinking about using say a speaker to effect the airflow around an object (say a car or large semi-truck), and was trying to visualize some different things. I was thinking how, its well known that putting dimples would help airflow, but what if you also made them speakers. Would it be possible to push the air into a more aerodynamic shape? Certainly it wouldn't be that simple (extra weight alone, as well as the added noise would be issues which could very likely completely negate the benefits). Energy needed to power them, the space they'd take up (unless you made them clear it'd cause visability issues which would then need cameras and more electronics to compensate for). Maybe there's other speaker designs that would be better suited?

A further thought. Say, on the Prius with the optional solar panel roof. Is it possible to make solar panels convcave? Turn it into a speaker, where it uses the electricity it gets via solar to power itself as the speaker mechanism? Again, this wouldn't be practical, but just something that popped into my head. Er, I guess I'm meaning each solar cell that makes up the panel (not the whole panel as the concave shape would be too large.

Then again, what if you could dimple the panel and then have the whole thing extrude like you'd need for the speaker. Of course, I'm not sure how this would impact air pressure (wouldn't as it moves inward, pull air toward it?).
Click to expand...

Bombardier uses this basic principle for active sound deadening in the cabin. You have a propeller beating a consistent rhythm on the air which can be affected by pressure waves. Pretty simple ideas.
 
marvdmartian said:
Maybe you could put your speaker in a large mold, and pour/set Jell-O around it. Once it solidifies, play some music, and the sound waves ought to come right through the gelatin where you can see them.

Then get back to us on what you see! :sneaky:
Click to expand...

Are you a Mythbuster? :hmm:
 
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