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Audio and Video Talk
Acoustics & Room Treatment
New Room, No Bass
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<blockquote data-quote="Timber_MG" data-source="post: 817823" data-attributes="member: 18"><p>When dealing with wide-band nulls it is imperative to understand which mode(s) are responsible and which axi(e)s. In Evan's case it was front/back interacting with the ceiling and it was just unfortunate geometrically in that most speaker/listener positions had two modes. Also at the frequencies involved one needs to attain a high absorption coefficient or one might not achieve the desired effect as 3dB off a null that's 20dB deep is still far off, one would aim for something at least an order of magnitude which implies absorption of at least half that energy in the plane in question.</p></blockquote><p></p>
[QUOTE="Timber_MG, post: 817823, member: 18"] When dealing with wide-band nulls it is imperative to understand which mode(s) are responsible and which axi(e)s. In Evan's case it was front/back interacting with the ceiling and it was just unfortunate geometrically in that most speaker/listener positions had two modes. Also at the frequencies involved one needs to attain a high absorption coefficient or one might not achieve the desired effect as 3dB off a null that's 20dB deep is still far off, one would aim for something at least an order of magnitude which implies absorption of at least half that energy in the plane in question. [/QUOTE]
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Audio and Video Talk
Acoustics & Room Treatment
New Room, No Bass
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