thanks for the info On 26 April 2013 03:01, Sampo Syreeni <de...@iki.fi> wrote:
> On 2013-04-26, Augustine Leudar wrote: > > no, no its interesting - so you dont want room modes etc . >> > > I want them, but I want them controlled. Not controlled as in we just sort > of mitigated something somewhere. I want them controlled like blood, and > guts, and the Final Solution. > > > I ask because although its ridiculous tor try and build anything in the >> west - in Peru the opportunity exists of building almost any shaped room >> you like for under a 500 euro - they use adobe with a nice finish. I always >> though I might build on one day - but could never get a straight answer >> from anyone as to the ideal shape - you have remedied that somewhat. >> > > In that case, I'd actually better reword my stuff somewhat. Towards what > they can actually build at a reasonable cost (a *high* but reasonable > cost). With rationale to follow, so that you can choose the design > principles and techniques yourself. > > 1) Never go with a symmetrical shape. Go with easily built highly > asymmetrical shapes, so that all but direct sound bounces around more than > once before reaching you. That way you have more wall area and time over > which to control its final arrival. > 2) Utilize the next set of tools to control high frequency arrivals: > 2a) Multiple specular reflection, leading to spectral rolloff via > atmospheric traversal length. > 2b) Absorptive material on the walls, and traversable cloth 1/4 > wavelength off the surface to absorb velocity. > 2c) Acyclic dispersers on the wall, with selfsimilar grain. They make > both the time arrival pattern of a waveform more even and let the rest > of the dispersed means work better+over a longer time. > 2d) Acoustic metamaterials. They can add imaginary impedance to your > soundwaves, and some of them are also pretty simple. Give me three > heavy curtains and I'll build you one. > 2e) Open and/or prepared enclosures from your space towards the > outside. This stuff is how you trap the lowest frequencies. > 2f) Electronic correction. Works every time for LF where nothing else > works. > > > Im sure theres a way you could do it here cheaply with polytunnel >> material etc - of course youd be getting outside noise, but if ou lived >> somewhere quiet..... >> > > Uhhuh. :) You already know the drill. > > -- > Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front > +358-50-5756111, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2 > ______________________________**_________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/**mailman/listinfo/sursound<https://mail.music.vt.edu/mailman/listinfo/sursound> > -- 07580951119 augustine.leudar.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20130426/1da8efb8/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
