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Audio and Video Talk
Acoustics & Room Treatment
a new and smaller bass trap
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<blockquote data-quote="Timber_MG" data-source="post: 659150" data-attributes="member: 18"><p>These are highly tuned devices, but unlike Helmholtz absorbers they are easier to tune. Just know that you need a fair bit of coverage for the effect to be meaningful, 20% of room surface area will make a good dent.</p><p></p><p>I have done 1/4 wave tuned designs to mount behind diffusers before and their bandwidth is very limited. This is for ceiling axial modes mostly.</p><p></p><p>Also, analyze which room boundary is contributing to the mode in case of axial modes and place the device at a point where you have maximal pressure in that mode. If you're using DRC it may be better to focus on modes that cause nulls than peaks because doing so will have a wider band effect.</p><p></p><p>I wonder whether the second harmonic of the tuned device will present usable damping, I suspect it may. The restricted hole size will probably act as a low pass filter.</p></blockquote><p></p>
[QUOTE="Timber_MG, post: 659150, member: 18"] These are highly tuned devices, but unlike Helmholtz absorbers they are easier to tune. Just know that you need a fair bit of coverage for the effect to be meaningful, 20% of room surface area will make a good dent. I have done 1/4 wave tuned designs to mount behind diffusers before and their bandwidth is very limited. This is for ceiling axial modes mostly. Also, analyze which room boundary is contributing to the mode in case of axial modes and place the device at a point where you have maximal pressure in that mode. If you're using DRC it may be better to focus on modes that cause nulls than peaks because doing so will have a wider band effect. I wonder whether the second harmonic of the tuned device will present usable damping, I suspect it may. The restricted hole size will probably act as a low pass filter. [/QUOTE]
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Audio and Video Talk
Acoustics & Room Treatment
a new and smaller bass trap
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