Credit for the awesome architecture joke. You'll never have the opportunity to use that one again. Clever.
I'm just here for the "roofs absorb sound, not reflect it" from someone who never took second semester physics.
Speaking of architecturally sound, The roof shape forms a perfect "wispering gallery", designed so that when you tell the guy next to you that the linesman wouldn't know offside if it bit him in buttress, the assistant referee can hear you. https://en.m.wikipedia.org/wiki/Whispering_gallery
You beat me to it. I was gonna say, who cares about what the roof looks like, as long as it makes every-fing sound LOUDER!!!
I remember the flying buttress from my sophmore year in high school, AP European History class. We talked about architecture at some point. That is the extent of my architectural knowledge. And thank you for getting the joke.
Roofs absorb sound just like solar panels reflect the sun's light making global warming worse (as someone once explained to me).
The famous "roofs can't reflect or direct sound waves" poster also basically denied the existence of whisper galleries and amphitheaters. All while claiming to be an architectural expert. I guess all the whisper champers that exist use witchcraft.
Mr Warmth's point was that any panel will reflect sound waves, not amplify them. Unless the panel is absorbant like foam. Amplification requires a moving body which a roof panel is not. A nice flat roof panel may maximize reflection, but it sure doesn't amplify it. I agree with Mr Warmth!
As I remember it this isn't even an accurate representation. He never said they couldn't do that. He said they are not designed to do that and that barring designed correctly any such reflections were more likely to disrupt sound than it would be to amplify it. I don't know if that's correct (though I could probably work it out if I wanted to) but the basic principles are sound (no pun intended).
I deleted my post just a minute after posting it because I decided it was a bad idea to get into this again but you pounced that fast.
Hello Diane. It's been a long day with deadlines, but my concept was approved by the Owner, so I won't have to work this weekend and I can take down your misrepresentation, syllable by syllable in the morning.
Here's the thing. And this is science. A stadium with zero roof has "X" amount of sound waves escape to the atmosphere. A stadium with a roof will redirect "Y" amount of "X". So even if 1% of the sound waves that would normally escape to atmosphere (which would be beyond most acoustic technology available today) are redirected towards the interior of the stadium it WILL BE LOUDER. That's fact. Anything else is alternative fact.
Come on, you know better. Sound waves can (essentially) cancel each other out which means it would not be louder in any way measurable to the human ear. I'm not saying that happens in stadiums, I'm just pointing out the flaw in your blanket statement.
Get your corn pops ready, because its coming in the morning when Mr. Warmth has had his morning Coffee.
They COULD cancel each other out, but that would be just as likely as them coming into phase and creating a harmonic which would be CRAZY loud. If we think of sound as a distortion travelling though the air it's pretty easy to understand that a roof would reflect some of the distortion that hits it and redirect it. In fact, if you were super desperate to prove this stuff, you could set up a directional mics facing the source of the sound (the crowd) on either side of the roof and find out exactly how much is being redirected and absorbed. And if you wanted to break those two down you could measure the vibrations caused by the sound waves that are turned into mechanical energy (you'd have to create a control first and do it on a windless day.) If there's an industrious physics student out there I invite them to go for it.
They can't because it is difficult to do this in a 5ft x 5 ft room, let alone a stadium. You have to be able to cancel out all residual waves. Any "amplification" is just an echo where sound travels to rather than sound being created.
So, there was news about the stadium expansion in the past week. I just self appointed myself as Judge and reduced you all 10 internet points for the silly discussion that just occurred instead of this news. Portland City Council and Timbers move forward on new stadium expansion agreement http://www.oregonlive.com/timbers/i...uncil_and_timb.html#incart_river_mobile_index