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Audio and Video Talk
Acoustics & Room Treatment
Bass Null
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<blockquote data-quote="Micron" data-source="post: 853308" data-attributes="member: 17294"><p>To answer the second part of your question; if you had no back wall you would eliminate one reflective surface, so less reflections will exist in the room, which will reduce the amount of cancellation, but the reflections from all other surfaces will still be present and they will still cause nulls. The frequencies at which those nulls occur will depend on the dimensions of the room.</p><p></p><p>Having no back wall, and assuming infinite space beyond where the wall would have been, would be analogous to having an absorber with a 100% absorption coefficient across all frequencies on that plane, because no sound will reflect back from that plane.</p><p></p><p></p><p>If some of this is confusing the following article can offer clarity; http://ethanwiner.com/acoustics.html.</p></blockquote><p></p>
[QUOTE="Micron, post: 853308, member: 17294"] To answer the second part of your question; if you had no back wall you would eliminate one reflective surface, so less reflections will exist in the room, which will reduce the amount of cancellation, but the reflections from all other surfaces will still be present and they will still cause nulls. The frequencies at which those nulls occur will depend on the dimensions of the room. Having no back wall, and assuming infinite space beyond where the wall would have been, would be analogous to having an absorber with a 100% absorption coefficient across all frequencies on that plane, because no sound will reflect back from that plane. If some of this is confusing the following article can offer clarity; http://ethanwiner.com/acoustics.html. [/QUOTE]
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Audio and Video Talk
Acoustics & Room Treatment
Bass Null
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