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Who are you referring to?

Intuition. No. The only point of anything I described was to QUICKLY do something to correct the unintelligible speech. I did NOT at any point claim that I had any knowledge of WHAT anything caused. Quite the contrary. In addition, the apparent need (according to miroslav) for me to "lighten...

Some time ago, maybe within the last year or so, I found a relatively recent research paper (I think it was Canadian, but not 100% sure) but lost it since... It addressed the different types of walls with different styles of cavities AND included data about the FREQUENCY spectrum of the...

Yes I am concerned about "LF build up in the room" and things like that. But like many other people (?) I can not choose to tear the place apart and do exactly what I want. 10 layers of whatever? It's already there. So you see, the question is more like, would it be worthwhile to tear half of...

Oh yeah, sorry. Fiberboard in this case would be "low density particleboard". Although indeed it doesn't really matter, could be MDF, drywall or... cast iron, in any case 10 layers (with the typical ~2 cm board thickness) is 10 layers. A quick check told me that the cheapest particle board they...

More mass is exactly what I was going for. A massive, THICK wall should stop low freq more than a thinner and lighter wall with something soft (and light) like rockwool batts behind it, should it not? I'm a bit confused by how you said in the first paragraph that more mass is better, but...

Just quit busting my balls man. I don't get what your problem is. Actually, now that I think of it, I think the first thing I tried was to tape old newspapers to that back wall and slam some couch pillows in the corners. That also worked quite well. I also tried a thin mattress from an old yard...

Just quickly listened to a recorded bass track. There's, for example, absolutely no problem hearing the difference between low B and low C, which fundamentals are WAY below 50 Hz. What's more distracting is the mechanical vibrations those notes cause, everything on the table starts shaking and...

Yeah. It's interesting, I just checked the claimed specs of my speakers, the woofers are 120 mm (a little small for bass in any case I guess) and the freq response said to be only 50-25k. So if that's correct, they can't reproduce even the low E fundamental. Which is a bit surprising since they...

You're right, you're the one here who just keeps on trolling for no reason. LOL

A room. Three walls are thick concrete/plaster/brick. The "door" or "fourth wall". How to prevent low, including very low (under 100 Hz), frequency sound from getting through? Rockwool, fiberglass and similar materials only absorb or block high frequencies, so why would one use them at all as...

Okay, you aren't "antagonistic". You are something else. I can't help you.

I'm non-plussed by your near-antagonistic social approach. I don't get it. Are you simply THAT serious? There's stuff concerning EPS that I don't know or understand, so much so that even formulating a question is complicated (I don't know physics per se very well). But you would just answer...

I did not say you weren't trying to be helpful, I said it's difficult to tell. Important difference. You seem to want to try to read my mind, instead of reading what i actually said. Déjà vu. There is no hidden agenda, I don't want to "swing the world my way". I know that's something I can not...

You win. I don't know what any of that stuff is... but... and... I don't get it. How or why did you have all that stuff in the first place? Was that just the easiest way to make glue?

You don't know? In your very first reply you yourself tried to answer the question, in some detail. Many others have provided more details. I just don't see your problem. I will gladly try to clarify anything I said, if needed.

Hmm... what does "useful" mean here? I've played bass (electric bass guitar) live through my cheap crap monitors that have around what, 4" woofers maybe and they are able to produce it well enough that I can hear the note. The fundamental of the low B for example is 31 Hz. I don't know but I...

Yes, I should mention I do not presume to know WHY it causes anything it does. I also didn't mention other details, such as the sheet being comparatively small, sound can easily travel around it what with the 8 foot tall ceiling, the surrounding walls are painted concrete, et cetera. No one...

Thank you. As an audio inexpert... I just decided to do a small test, just because I can. A 50mm thick sheet/block of EPS held directly between the LF sound source and the microphone causes a hefty 6 dB reduction in the resulting recording. Across all frequencies (lowpass at 1 kHz -- same...

Now THIS is interesting, and incidentally something that I researched (or tried to) a couple of years back. I also don't like the look of painted drywall. I also THINK I don't like the SOUND (reflections) of painted drywall. A million people told me that unpainted aka porous wood would sound the...