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Looper's Delight
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Hi Per, thanks for responding. I was unclear, sorry
That would give creeping waves (convex) not whispering gallery waves (concave) - WGW are Rayleigh's discovery way back when he noticed them in St Paul's in London. There's a nice animation here for the curious http://kino-ap.eng.hokudai.ac.jp/WG.html But I was thinking of another type of thing - probably a special case of the WGW. When really young (5) I lived on the other side of Oz, and near me there was a small cave system that if you squeaked (I was young) the squeak would return a noticeable duration later. Presumably the sound made a round trip inside. So this isn't just a WGW, it was a WGW with no possibility of escape, only of being dampened by the amount of air it had to traverse. I thought the toroidal shape of a particle generating structure would be interesting - the amount of air would dampen any attempt at subtlety, but if the sound was loud enough, and the tunnel long enough, I thought it might naturally loop. So I thought I would ask people if anyone had tried one. Anyway, with people decommissioning such structures due to budget cuts around the world, perhaps someone conveniently located might get a chance to check one out if the occasion arises. If they were shutting it down, someone with a stack of amps and a suitable guitar+pedals might test the idea out. (bootnote - I revisited the cave later and a rock fall had ruined the sound) > Date: Tue, 28 Oct 2014 16:15:39 +0100 > Subject: Re: Acoustic looping > From: perboysen@gmail.com > To: Loopers-Delight@loopers-delight.com > > I've done "acoustic looping" a couple of times but found that most > natural, or architectural, ambiences tend cause too much diffusion for > a really useful looping experience. The best set-up would be to play > in front of a wall that is located in a flat environment with nothing > else to cause diffusion to the echoed sound. > > Greetings from Sweden > > Per Boysen > www.perboysen.com > http://www.youtube.com/perboysen > > > On Tue, Oct 28, 2014 at 11:53 AM, Ivodne Galatea <takas20@hotmail.com> wrote: > > Anyone here shouted or played a trumpet down the LHC at CERN (or a smaller > > atom smasher). I imagine it would (if it worked at all) be like the > > whispering galleries at St Paul's. If not, perhaps someone should (in the > > interest of science, of course) > > > > ig > |