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Message: [QUOTE="sutomcat, post: 4650060, member: 27"] I would think if you tried it under the JMA sign (I think it is possible there), if anything, the effect would be amplified somewhat. I think the sound waves made by your feet radiate up to the undercarriage of the roof and get reflected back down, kept largely intact by the fluting on the sides of the walls. That is what creates the sound effect. Some of the sound waves radiate away from the wall and are lost. But the massive sign should retain some of those sound waves that would have otherwise been lost. This is something that needs to be tested, videoed and posted on this site. Where is Ben Burtt Jr when you need him the most? [MEDIA=youtube]pkJYoNy2FrA[/MEDIA] [/QUOTE]