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Post by Loop 7 on Aug 18, 2016 20:17:03 GMT -5
Here's my disaster of a room. Even with rugs and window coverings, clapping a hand once offers a bright, sharp return (speakers are not to scale). Ridiculous. Dang, that must be tough to regulate. More gain and bass on the left channel I'd guess with vastly different 1st order reflections. I don't have the cathedral ceiling but I do have 20' ceilings, nearly square room and hardwood floors as well. Scott You are 100% correct regarding gain and reflections. Moving in the next 3-6 months and, during my real estate search, sane listening spaces are a factor.
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novisnick
EmoPhile
CEO Secret Monoblock Society
Posts: 27,235
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Post by novisnick on Aug 18, 2016 20:20:08 GMT -5
Dang, that must be tough to regulate. More gain and bass on the left channel I'd guess with vastly different 1st order reflections. I don't have the cathedral ceiling but I do have 20' ceilings, nearly square room and hardwood floors as well. Scott You are 100% correct regarding gain and reflections. Moving in the next 3-6 months and, during my real estate search, sane listening spaces are a factor. Your moving? Forgettaboutit!! Move the speakers to an adjacent wall, that would help tremendously. Otherwise, its time for headphones or just NO critical listening. Good luck on the house hunt?
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Post by AudioHTIT on Aug 18, 2016 20:29:36 GMT -5
How do you figure a high ceiling is more beneficial than acoustic treatment? Not saying it won't but just trying to understand the science behind (er.. above?) it... All other things being equal - Reflection time. Larger spaces = longer reflection times (and lower reflection amplitudes) due to the inverse-square law. ... and lower the frequency of the floor to ceiling resonance.
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Post by yves on Aug 20, 2016 12:30:37 GMT -5
All other things being equal - Reflection time. Larger spaces = longer reflection times (and lower reflection amplitudes) due to the inverse-square law. ... and lower the frequency of the floor to ceiling resonance. ...and the online proliferation of myth as opposed to actually fixing the problem of modal ringing in a room.
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Post by AudioHTIT on Aug 20, 2016 12:38:33 GMT -5
... and lower the frequency of the floor to ceiling resonance. ...and the online proliferation of myth as opposed to actually fixing the problem of modal ringing in a room. So you deny that a longer wavelength produces a lower frequency? I say that facetiously, I'm just wondering what you're point is now?
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Post by yves on Aug 20, 2016 13:17:28 GMT -5
...and the online proliferation of myth as opposed to actually fixing the problem of modal ringing in a room. So you deny that a longer wavelength produces a lower frequency? I say that facetiously, I'm just wondering what you're point is now? No, wavelength is still inversely proportional to frequency. But the point of breaking up standing waves by installing bass traps in a room is to, at main listening position, flatten the bass part of frequency response as well as to reduce excess reverberation times / to tame wild differences in reverberation time between adjacent bass frequency bands, and, if multiple listeners are concerned, to help mitigate seat-to-seat variations in the bass sound. P.S., here's a link to an article on the importance and explanations of various types of room acoustic measurements, and how to interpret results: www.acousticfrontiers.com/room-acoustic-measurements-101/
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Post by AudioHTIT on Aug 20, 2016 13:51:35 GMT -5
So you deny that a longer wavelength produces a lower frequency? I say that facetiously, I'm just wondering what you're point is now? No, wavelength is still inversely proportional to frequency. But the point of breaking up standing waves by installing bass traps in a room is to, at main listening position, flatten the bass part of frequency response as well as to reduce excess reverberation times / to tame wild differences in reverberation time between adjacent bass frequency bands, and, if multiple listeners are concerned, to help mitigate seat-to-seat variations in the bass sound. P.S., here's a link to an article on the importance and explanations of various types of room acoustic measurements, and how to interpret results: www.acousticfrontiers.com/room-acoustic-measurements-101/And I was just adding to Boomzillas list, raising the ceiling height lowers the resonance frequency for that node, that is not a myth.
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Post by yves on Aug 20, 2016 14:32:26 GMT -5
No, wavelength is still inversely proportional to frequency. But the point of breaking up standing waves by installing bass traps in a room is to, at main listening position, flatten the bass part of frequency response as well as to reduce excess reverberation times / to tame wild differences in reverberation time between adjacent bass frequency bands, and, if multiple listeners are concerned, to help mitigate seat-to-seat variations in the bass sound. P.S., here's a link to an article on the importance and explanations of various types of room acoustic measurements, and how to interpret results: www.acousticfrontiers.com/room-acoustic-measurements-101/And I was just adding to Boomzillas list, raising the ceiling height lowers the resonance frequency for that node, that is not a myth. That is not a myth, but rather, the notion that room acoustics will generally be improved by removing (i.e., as opposed to making informed adjustments) any and all acoustic treatments from the ceiling is a myth.
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Post by yves on Aug 20, 2016 15:35:45 GMT -5
As a matter of true fact, professional acousticians tend to acknowledge that leaving a significant air gap above the ceiling acoustic tiles or "cloud" can be a cost effective way to compensate for the fact the absorbtion material usually has to be, due to practical constraints (e.g., a drop ceiling assembly has typically only limited construction strength to support very thick and heavy tiles) too thin to be capable to help absorb low frequencies. So if the untreated ceiling height (i.e., tiles removed) is more than 8′ then it makes perfectly good sense to install the tiles at a height much lower than several inches below the actual ceiling's hard reflective surface. Further, against this same surface, along the perimeter of the ceiling it can make sense to install additionally very thick "soffit" style bass traps. (If your walls are solid you could decide to place these big soffit bass traps in the corners between the ceiling and walls by attaching them to the walls instead of attaching them to the ceiling, in order to prevent their heavy weight from having to be supported by holes that you would need to drill into the ceiling).
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