Well they claim it's 'still active' below 50Hz . I.e. it isn't zero. That gives them some rather shady rhetorical wiggle room.They advertise this panel as a "broadband bass trap" and declare that it is active even below 50Hz. How? Their own charts show that below 60Hz, there is sharp drop in efficiency. Besides, the wavelength of 50Hz is 6.8m how can a 25cm panel absorb that wave?
Not really because the same sentence also says "great performance". Not to mention that we have no proof whatsoever that those charts are even valid. There is no reference to their authenticity other than a signature on one of the charts, which is ruler flat and does not tally the other chart.Well they claim it's 'still active' below 50Hz . I.e. it isn't zero. That gives them some rather shady rhetorical wiggle room.
I didn't post this to to say that I am going to sue them, I posted this to show their "shadiness" to ASR members.Look, I don't disagree this is shady marketing. I'm imagining what their response would be. 'Still active' is a measurable claim and doubtless technically true (...albeit insignificant), and 'great performance' is pure subjectivity. So they can still wiggle.
Have you considered a Helmholtz absorber?Pourus materials have their limits and even with a membrane you know the results, a 25cm thick panel can't do miracles , i am planning for my living room a false wall of absorption and i am going with 60cm of pourus materials and even that you don't tame them in the very low end
Yes I know the resonators but this is a false wall that I have to make because it's a new home and if I don't make it this way with the acoustic property i have to make it with a classic wall Soo i thinked why notHave you considered a Helmholtz absorber?
Most recent update is here. I have been posting about benefits of acoustic treatment of a room, especially in larger rooms. I believe that if done right it is a better, and if you have basic carpentry skills, a much cheaper option then using multiple subwoofer setups. I have the degree to do it...www.audiosciencereview.com
The issue is, at best you will get a wide-band absorption that reaches the bass but what about the standing waves? They will still exist if you don’t absorb selectively.Yes I know the resonators but this is a false wall that I have to make because it's a new home and if I don't make it this way with the acoustic property i have to make it with a classic wall Soo i thinked why not
I was talking about an even dispersion as the opposite of polar lobing. But don't worry about it as it's off topic.How low are we talking?
It's a living room sadly, i can't go full treatment, understand me... Doing the best I can with some panels and libraries books, i am studying the situation with an help of an acoustician, and he already told me that i am good more than good for the average living roomThe issue is, at best you will get a wide-band absorption that reaches the bass but what about the standing waves? They will still exist if you don’t absorb selectively.
You may read my various posts about various acoustic treatment elements having been built for me in a DIY way.the diffusers are questionable, but all the rest seems VERY cost effective. Before uttering critisism I would try to construct just ONE panel, with the same performance, DIY, for less then their asking price !
I have nothing against DIY. My DIY polys are 35 euro each. They are quite big and dirt cheap.You may read my various posts about various acoustic treatment elements having been built for me in a DIY way.
Besides, misleading data with no reference on how it is measured can never be compensated with low price.
They are mostly bigger than most living room furniture's, that's why.
Nice room but you have proved my point that acoustic treatment elements are larger than the furniture in a roomThat depends how low frequency you want to go as well as how much of the walls/ceiling is covered by panels (and thickness of course). But from there just claiming all of it is not suitable at all for a domestic living room at all is more than a stretch.
Below is from my small living room with flat panels 10cm think both front and back wall, with the one on the back having a 9cm air gap. The layout is the only practical one for the 5.2 setup in a room that is not great at all. It helps but there are still issues, of course.
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May I ask you to please read my opening post? Also, can you point me to the product page where they give reference to the facility that made the test, please?But again, how is data misleading when the tests have been done at a well established facility ? I admit, the website seems to be quite disfunctional (black friday updates ?), but I am 100% sure normally all the info is there.