geoffkait,
That is the beginning of what I was thinking about in my hypothetical room, or let’s say that room that you had copied the article about. Although, I was, in my mind, playing with multiple variables of the equation. I was mostly wondering about density and that was, in fact, how I imagined the change in Reynolds number. You picked viscosity. All the same for practical purposes of theoretic imagination. I envisioned different air composition. In my thoughts, I used Helium. I guess 80/20 would be preferred. That led me to thinking what happens to the sound perception (actually, I called it simply "sound") with changes in density of the medium and how it would affect the direction, energy transfer, and whatever else may be involved. Even that unfortunate laminar flow would be greatly affected or enhanced so, if it actually matters, it would affect the sound based on that fact, too. I went through those mind exercises without coming up with any conclusion I would be able to stand behind, but it was a fun exercise for me. Sure, it would be quite complicated to do it in real life, not impossible but prohibitive on more than one level. Making a room Helium-tight would be a decent challenge. For most, just the price of HeliOx would be ridiculous even for a relatively small room (and the one I was imagining was the one on the picture on MG’s website next to where laminar flow is mentioned and it seems quite large). I think that canister is around $700, but may be very wrong about that one. You would likely need many of them. All in all, it was just an exercise, not anything I would consider doing. I was not thinking of change of Reynolds number as means to enhance laminar flow (although that is how I remembered it at first), but as a product of changed density. In my mind, I changed the density which then changed the Reynolds number, and conveniently that would also do something to flow characteristics, in case anyone is interested in that part.
However, it all did come to me from my post you may not recall. In it, I mentioned how I was interested in what methods Michael Green uses to determine where to place his shutters as it seems impossible that placing them in the same position in different rooms would yield same results. You could get it by luck, but then you could also just throw a few pillows around and call it a day, too. That is when I mentioned I find it hard to imagine how it may be done because I would guess it would require equipment and staff for laminar flow measurements and then doing it at different heights and temperatures which I cannot imagine being very convenient even for a well-run business. I may be wrong on that. Temperature was that link from Reynolds number as it, as you pointed out, affects at least viscosity. That is why I actually did stop and think about your ice-cold water for a moment.
Velocities in any kind of listening room are probably very low and likely cannot be greatly influenced, but viscosity and density could, as above. However, there will practically always be some turbulent flow of air in a vessel, in our case the vessel is listening room. If the walls are perfectly smooth, paints differ wildly on that one I just learned, turbulence will increase with distance from the wall, making the middle of our listening room the most vulnerable spot. Of course, add a chair or two and all bets are off. I speculate that, barring a hurricane in the room, turbulent flow will not have much influence on the propagation of sound. I am not saying none, but not much. Of course, for this purpose anything may be important.
That all was just trailing on my initial question about "organizing laminar flow". All of this above had nothing to do with that initial question, but it somehow got out of hand when I thought of it.
The more I think about that "organizing laminar flow", the more I am getting a feeling it is just poor choice of words. Not that I am a firm believer in it for CD-listening purposes, but am focusing on basic statement I read on website.
I am sorry if all of this above is not written clearly, I just wrote as fast as I was thinking about it and as fast I could write it, I did not edit it as it is very late.
For the purpose of this thread, I just talked the talk. If anyone is willing to walk the walk and do what I imagined above, I will humbly admit you are a real walker.
That is the beginning of what I was thinking about in my hypothetical room, or let’s say that room that you had copied the article about. Although, I was, in my mind, playing with multiple variables of the equation. I was mostly wondering about density and that was, in fact, how I imagined the change in Reynolds number. You picked viscosity. All the same for practical purposes of theoretic imagination. I envisioned different air composition. In my thoughts, I used Helium. I guess 80/20 would be preferred. That led me to thinking what happens to the sound perception (actually, I called it simply "sound") with changes in density of the medium and how it would affect the direction, energy transfer, and whatever else may be involved. Even that unfortunate laminar flow would be greatly affected or enhanced so, if it actually matters, it would affect the sound based on that fact, too. I went through those mind exercises without coming up with any conclusion I would be able to stand behind, but it was a fun exercise for me. Sure, it would be quite complicated to do it in real life, not impossible but prohibitive on more than one level. Making a room Helium-tight would be a decent challenge. For most, just the price of HeliOx would be ridiculous even for a relatively small room (and the one I was imagining was the one on the picture on MG’s website next to where laminar flow is mentioned and it seems quite large). I think that canister is around $700, but may be very wrong about that one. You would likely need many of them. All in all, it was just an exercise, not anything I would consider doing. I was not thinking of change of Reynolds number as means to enhance laminar flow (although that is how I remembered it at first), but as a product of changed density. In my mind, I changed the density which then changed the Reynolds number, and conveniently that would also do something to flow characteristics, in case anyone is interested in that part.
However, it all did come to me from my post you may not recall. In it, I mentioned how I was interested in what methods Michael Green uses to determine where to place his shutters as it seems impossible that placing them in the same position in different rooms would yield same results. You could get it by luck, but then you could also just throw a few pillows around and call it a day, too. That is when I mentioned I find it hard to imagine how it may be done because I would guess it would require equipment and staff for laminar flow measurements and then doing it at different heights and temperatures which I cannot imagine being very convenient even for a well-run business. I may be wrong on that. Temperature was that link from Reynolds number as it, as you pointed out, affects at least viscosity. That is why I actually did stop and think about your ice-cold water for a moment.
Velocities in any kind of listening room are probably very low and likely cannot be greatly influenced, but viscosity and density could, as above. However, there will practically always be some turbulent flow of air in a vessel, in our case the vessel is listening room. If the walls are perfectly smooth, paints differ wildly on that one I just learned, turbulence will increase with distance from the wall, making the middle of our listening room the most vulnerable spot. Of course, add a chair or two and all bets are off. I speculate that, barring a hurricane in the room, turbulent flow will not have much influence on the propagation of sound. I am not saying none, but not much. Of course, for this purpose anything may be important.
That all was just trailing on my initial question about "organizing laminar flow". All of this above had nothing to do with that initial question, but it somehow got out of hand when I thought of it.
The more I think about that "organizing laminar flow", the more I am getting a feeling it is just poor choice of words. Not that I am a firm believer in it for CD-listening purposes, but am focusing on basic statement I read on website.
I am sorry if all of this above is not written clearly, I just wrote as fast as I was thinking about it and as fast I could write it, I did not edit it as it is very late.
For the purpose of this thread, I just talked the talk. If anyone is willing to walk the walk and do what I imagined above, I will humbly admit you are a real walker.
