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Audio and Video Talk
Acoustics & Room Treatment
Group buy - acoustic panels
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<blockquote data-quote="Timber_MG" data-source="post: 421809" data-attributes="member: 18"><p>Attie, if you use a super chunk and stuff it full of 200 kg/m^3 material it will be effective to a lower frequency, but with a roll-off from higher frequency. There is an optimum and the further away you move from the wall, the lower the density required (but the more volume). A 600mm triangle bass trap is big by living room standards, but acoustically small for low bass. 7-11% of wavelength depth are often bandied about as the depth required to begin effective absorption.</p><p></p><p>Ethan made an interesting experiment and with 600mm panels straddling corners the higher densities are definitely more effective at lower frequencies, though if you're only applying a set amount of material spreading that over more corners had a greater return. In my case, I use a truncated 800mm triangle and with low density stuffing it is very effective to ~50Hz but damping tapers off notably below that. The high density material would in theory extend a bit lower but not have as high an absorption coefficient higher up the band.</p><p></p><p>I rely on EQ and 4 subwoofer sources for the range below that and am very pleased with the outcome.</p></blockquote><p></p>
[QUOTE="Timber_MG, post: 421809, member: 18"] Attie, if you use a super chunk and stuff it full of 200 kg/m^3 material it will be effective to a lower frequency, but with a roll-off from higher frequency. There is an optimum and the further away you move from the wall, the lower the density required (but the more volume). A 600mm triangle bass trap is big by living room standards, but acoustically small for low bass. 7-11% of wavelength depth are often bandied about as the depth required to begin effective absorption. Ethan made an interesting experiment and with 600mm panels straddling corners the higher densities are definitely more effective at lower frequencies, though if you're only applying a set amount of material spreading that over more corners had a greater return. In my case, I use a truncated 800mm triangle and with low density stuffing it is very effective to ~50Hz but damping tapers off notably below that. The high density material would in theory extend a bit lower but not have as high an absorption coefficient higher up the band. I rely on EQ and 4 subwoofer sources for the range below that and am very pleased with the outcome. [/QUOTE]
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Audio and Video Talk
Acoustics & Room Treatment
Group buy - acoustic panels
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