Gerry Posted November 21, 2010 Share Posted November 21, 2010 This question is posed by a non sound guy, but hopefully I am learning. :(I understand the theory and need to compensate by delaying the sound from multiple speakers but at what time difference does the difference become noticeable?Or to put it another way how far apparent can the speakers be placed before the difference is noticeable?CheersGerry Link to comment Share on other sites More sharing options...
Russ83 Posted November 21, 2010 Share Posted November 21, 2010 Good question, I would also like to know the answer from those with the practical experience. I've just done a test with a sawtooth tone generator and it's when I get down to 25Hz that the sound changes from a noise to defined pulses. Doing the maths that gives a period of 40ms which in terms of speaker placement is 15.5m apart. So from this I'd say anything over 15m would need delay which seems feasible, would be nice to know how far off I am... Link to comment Share on other sites More sharing options...
Brian Posted November 21, 2010 Share Posted November 21, 2010 It's not just about noticing the difference between two speakers. Time delays can do odd things to the imaging of a source as well as causing your radiation pattern to be different to what you expect. One interesting area to Google is 'Haas Effect'. Link to comment Share on other sites More sharing options...
Simon Lewis Posted November 21, 2010 Share Posted November 21, 2010 Or to put it another way how far apparent can the speakers be placed before the difference is noticeable? Brian has mentioned Haas, but that's normally two different effects, so try Googling Haas and then try Wallach and the Precedence Effect. If you want some more detail look for time / intensity trading, ITD, IID & IACC... Simon Link to comment Share on other sites More sharing options...
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