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Old 17th March 2019
  #15
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Quote:
Originally Posted by RayGlz View Post
...Another no scientifical test I did was using a drums tunning app. If I hit the floor with my fist hard enough to make a loud sound. The app reads exactly 73Hz.

The floor Is damped with a heavy rubber layer and green glue but i think It IS resonating.
Yes, I believe you.

Quote:
Ah! and other thing I found out is that the wavelenght of 73 Hz is 4.7 meters, almost matching the room width.

How could I make myself sure that It is the floor actually making things worst?
Yes, and mode 4.0.0 (room length: 9.81m) is 70 Hz. In fact all three dimensions have coincident or near coincident modes.

Quote:
How could I make myself sure that It is the floor actually making things worst?
The floor will vibrate in sympathy with the air bourne resonances (modes).
Worse? Possibly.

I think it’s better to start treating the acoustics.

My suggestion for a start:
Build floor to ceiling square ”pillar” traps in 4 corners. 60x 60x 300 cm with low GFR ”fluffy”.

Window (south) wall corners.
Drummer right hand corner and east wall mid corner.

That will shorten the decaytime a bit. (make REW measurement)
How much and what kind of treatment do you have in mind?

Then, if the floor is still concidered a problem, one can build heavy platforms for the drums and the bass cab. (Boxes filled with gravel).
That will surely lower (damping) the frequency of the floor vibrations.

Best