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Infocomm???
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<blockquote data-quote="Tom Danley" data-source="post: 141449" data-attributes="member: 259"><p>Re: Infocomm???</p><p></p><p></p><p></p><p>Hi Harry</p><p>For direct radiators to combine coherently without an interference pattern (and also a requirement for mutual coupling or horn loading), they have to be 1/4 wl or less at the highest frequency of concern.</p><p></p><p>For high frequencies, one can't achieve this (20KHz wl is about 5/8 inch) but one can combine arc segments close enough together and shaped properly so that the result appears to have been produced by a single driver at a distance within a horn. </p><p>If a solution had been obvious all along, one could have said the up side of line arrays is that because of all the destructive interference (self cancellation) it takes a lot more drivers and amplifiers to do a given job which may not be so good for the end user or listener but is great for the sales department.</p></blockquote><p></p>
[QUOTE="Tom Danley, post: 141449, member: 259"] Re: Infocomm??? Hi Harry For direct radiators to combine coherently without an interference pattern (and also a requirement for mutual coupling or horn loading), they have to be 1/4 wl or less at the highest frequency of concern. For high frequencies, one can't achieve this (20KHz wl is about 5/8 inch) but one can combine arc segments close enough together and shaped properly so that the result appears to have been produced by a single driver at a distance within a horn. If a solution had been obvious all along, one could have said the up side of line arrays is that because of all the destructive interference (self cancellation) it takes a lot more drivers and amplifiers to do a given job which may not be so good for the end user or listener but is great for the sales department. [/QUOTE]
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