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<blockquote data-quote="Phil Graham" data-source="post: 107519" data-attributes="member: 430">Re: Array ConfigurationThis not the case as the instructor describes, unless he/she was doing it schematically at one frequency to make a point. Even then, the description of bringing the drivers together is suspect at best.What is generally the case, irrespective of the sound source:<ol>
<li data-xf-list-type="ol">A curved, finite arc source of sound will have a narrowing of directivity in the proximit of a wavelength whose dimension is near the total arc curve length. &quot;Line&quot; array, front loaded box, horn loaded box, doesn&#039;t matter; that the overall directivity subtends a finite curved angle is what matters.</li>
<li data-xf-list-type="ol">Delaying the outer corners of the array, in a specific window of frequencies, can help retain the arc&#039;s directional consistency through the region of narrowing directivity.</li>
<li data-xf-list-type="ol">Reducing the output at the periphery via level tapering can achieve similar results. This can be done without as dramatic effects on the polar response at other frequencies.</li>
</ol>I&#039;ve only successfully applied the staggered delay technique a couple times in the wild. In my experience, it only works with large horn-loaded boxes: the correct delay time to broaden the array at, say 500Hz, will cause havoc at 2kHz unless the directivity of the devices is such as to be largely independent at higher frequencies.</blockquote>

[QUOTE="Phil Graham, post: 107519, member: 430"] Re: Array Configuration This not the case as the instructor describes, unless he/she was doing it schematically at one frequency to make a point. Even then, the description of bringing the drivers together is suspect at best. [B]What is generally the case, irrespective of the sound source:[/B] [LIST=1] [*]A curved, finite arc source of sound will have a narrowing of directivity in the proximit of a wavelength whose dimension is near the total arc curve length. "Line" array, front loaded box, horn loaded box, doesn't matter; that the overall directivity subtends a finite curved angle is what matters. [*]Delaying the outer corners of the array, in a specific window of frequencies, can help retain the arc's directional consistency through the region of narrowing directivity. [*]Reducing the output at the periphery via level tapering can achieve similar results. This can be done without as dramatic effects on the polar response at other frequencies. [/LIST] I've only successfully applied the staggered delay technique a couple times in the wild. In my experience, it only works with large horn-loaded boxes: the correct delay time to broaden the array at, say 500Hz, will cause havoc at 2kHz unless the directivity of the devices is such as to be largely independent at higher frequencies. [/QUOTE]

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