Audyssey Announces Low Frequency Containment (LFC) Technology
Audyssey Low Frequency Containment (LFC)
Everyone, at one time or another, has been annoyed by the unpleasant thumps of a neighbor watching a movie or listening to music late at night. While high frequencies are easily stopped by walls, low frequencies go right through them. Well, Audyssey, never content to sit on its laurels in the area of sonic advancement, announced its new Audyssey Low Frequency Containment, or Audyssey LFC. The new technology supposedly prevents low frequencies from traveling through walls, minimizing disruption in neighboring rooms or apartments with minimal impact on bass enjoyment.
It's very difficult to acoustically isolate a room because it involves additional construction. Audyssey researched how bass wavelengths interact with wall materials and developed a technology that solves the problem at the source. To attack the issue at its very core, the researchers at Audyssey first determined the range of frequencies that most readily pass through walls. Once the range was identified, they developed a process not only to reduce the level at those frequencies, but also to apply psychoacoustic processing that restores the perception of low bass for listeners in the room. Audyssey LFC is not a simple filter; rather, it dynamically monitors the low frequency range and engages only when it finds the offending frequencies. The result is a win-win situation for everyone. No more angry neighbors and no loss of enjoyment for listeners.
Highlights
- Contain low frequencies. Audyssey LFC dynamically targets and lowers the particular frequency range that can pass through walls.
- Add back bass enjoyment. Audyssey LFC is not a simple filter. It also restores the perception of low bass with psychoacoustic processing.
- Fixes the problem at its source. Everyone has experienced thumping bass coming through the walls. Traditional attempts to contain low frequencies require expensive retrofitting and new construction, but Audyssey LFC stops the problem at its source.
Audyssey LFC will first appear in AVRs in September of this year.
For more information pleae visit http://www.audyssey.com/technology/audyssey-lfc.html
digicidal, post: 806563, member: 49889You have my avatar! I use that one on some other forums. You must be a Tool fan. You also may not be around any more… This thread just got a good bump.
Uh…. Thank you?
I guess the other question I would have about how this system would work falls squarely on the broad shoulders of “psychoacoustics” in the article. Although I think Bose has conclusively proven that it's possible to provide astonishingly inacurate FR and still convince people that your sound is fantastic, I wonder how something like frequency-replacement could work in a universal fashion.
It would seem to me that in the realm of psychoacoustics… timing is generally modifiable (DSP modes and room correction proves this) but cancelling out whole frequencies as described - which would include most if not all of the bass, and somehow creating the illusion of them still being there with non-offending frequencies (high midrange & treble) seems like an inherent impossibility.
Halon451, post: 1173282, member: 29777
Except it doesn't really work all that well at restoring that “perception” of low bass. I'm not sure exactly what kind of voodoo they've employed at the circuitry level to make that kind of magic happen but cutting frequencies is cutting frequencies, and they're either there or they aren't. I have a newer AVR that has this feature and after turning it on, it more or less killed my low end. But then again, I don't live in an apartment and have no need to “contain my bass” so I just let her rip. I only turned it on out of curiosity because I saw it in the settings of my AVR.
Was my basic impression, good one button solution for apartment/condo dwellers or other close proximity (maybe kids/wives in bed while you play ).
admin, post: 805692, member: 1
…Once the range was identified, they developed a process not only to reduce the level at those frequencies, but also to apply psychoacoustic processing that restores the perception of low bass for listeners in the room.
Except it doesn't really work all that well at restoring that “perception” of low bass. I'm not sure exactly what kind of voodoo they've employed at the circuitry level to make that kind of magic happen but cutting frequencies is cutting frequencies, and they're either there or they aren't. I have a newer AVR that has this feature and after turning it on, it more or less killed my low end. But then again, I don't live in an apartment and have no need to “contain my bass” so I just let her rip. I only turned it on out of curiosity because I saw it in the settings of my AVR.
afterlife2, post: 1017648
So does this work? Anybody try it out?
It sort of works. It basically just attenuates all the lower frequencies that might make things vibrate down by X amount depending on how high or low you set it. I'm not sure how it differs from just lowering the bass setting, but to me it's basically an easier albeit similar process to going into Audyssey's custom option and attenuating the lower frequencies down to create your own roll off.
Clint Deboer was terminated from Audioholics for misconduct on April 4th, 2014. He no longer represents Audioholics in any fashion.
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