I thought I would share my measurements about my first DIY conversion absorber
It is a plywood sheet attached to a timber frame and filled with damping material then attached to the wall
(the photo shows before totally filling it with damping material)
It is tuned at 68Hz
Let's see the measurements at listening position
Frequency response:
The red is with my HOFA natural bass traps, green is without them and blue is the conversion absorber. Close to zero differences below 100Hz, some differences between 100 and 200Hz
T60M graphs:
We can see that the HOFA does a way better job with broadband absorption above 100Hz but below 100Hz the conversion absorber performs slightly better
Waterfall diagrams:
No absorber
With HOFA
HOFA decreased the ringing above 80Hz but strangely it increased the ringing at about 70Hz
With the conversion absorber
Ringing at tuning frequency is reduced (but only compared to HOFA and not when compared to having nothing in the room). Ringing above 100Hz is not as effectively reduced as with HOFA
I must say that I am totally NOT impressed by the performance of the conversion absorber
Maybe I screwed up the build, not sure - anyway I was expecting some more impact overall
Any builds/comments/advice would be appreciated
It is a plywood sheet attached to a timber frame and filled with damping material then attached to the wall
(the photo shows before totally filling it with damping material)
It is tuned at 68Hz
Let's see the measurements at listening position
Frequency response:
The red is with my HOFA natural bass traps, green is without them and blue is the conversion absorber. Close to zero differences below 100Hz, some differences between 100 and 200Hz
T60M graphs:
We can see that the HOFA does a way better job with broadband absorption above 100Hz but below 100Hz the conversion absorber performs slightly better
Waterfall diagrams:
No absorber
With HOFA
HOFA decreased the ringing above 80Hz but strangely it increased the ringing at about 70Hz
With the conversion absorber
Ringing at tuning frequency is reduced (but only compared to HOFA and not when compared to having nothing in the room). Ringing above 100Hz is not as effectively reduced as with HOFA
I must say that I am totally NOT impressed by the performance of the conversion absorber
Maybe I screwed up the build, not sure - anyway I was expecting some more impact overall
Any builds/comments/advice would be appreciated
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