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msg wrote: »

billbillw wrote: »

pearsall001 wrote: »

It looks like you have things dialed in pretty good. Hitting peaks of 95db could be the culprit causing the issue with the drop ceiling.

It is supposed to be a Theater, right? 95+dB is part of the experience. Believe me, the volume doesn't approach what I hear in my local Dolby Cinema.

Maybe bits of 3M tape at the corners of the acoustic tiles to bind them lightly to the frame?

Scott, I think more noise comes from the metal/metal connections in the tile grid, not from the tiles to metal interface. Actually, I think I recall hearing more coming from inside the walls and from glassware in the bar last time I walked around during a heavy low bass segment. Overall, it is greatly reduced from years past. I think the real winner was wrapping back of the air vent in dynamat. The grid in my current theater is square too. My old house was rectangular and I think the longer spans caused more flex/noise.
I was just curious if Phil had any issues, but it sounds like he doesn't. It also sounds like even with 4 subs, he listens at a bit lower level than I typically do (for movies).

Local imax and atmos is borderline an aural assault fit for torture

Top gun easily peaked over 120db

pearsall001 wrote: »

billbillw wrote: »

Curious, for real. How does that drop ceiling handle all those subwoofers? Mine vibrates like crazy with just one SVS. I'd love to know if there is a trick to control that.
Of course, my area is a fair bit smaller for the theater.

How hot are you running the sub? Maybe your SPL is way too high. I never had any issue with any sub/subs vibrating the drop ceiling.

I try to match the Dolby Cinema experience 🤣
No, not really, I have the sub level matched with a test tone/pink noise. Some movies just shake the walls and ceilings, like Blade Runner 2049. I noticed some of the bottles in my bar were moving closer to the edge of the shelf after that movie!
I think it was worse at my old house, but in hindsight, more of that noise came from the old florescent light fixtures. I took those all out of my current house and just have the shallow 1-piece LED cans which are silent as can be. After that swap, I think I pinpointed the air vent as a source of rattle, so I put some old dynamat on the back side of that. Vibrations are minimal now, but I'm not sure if that would be true with all those RELs in my room.