Bambu Lab Exhaust Muffler or Fan Silencer-Magnetic

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Hi everyone, as you may have noticed, LOL, when we print, with our X1 Carbon, ABS, or other materials that need high temperatures, the filter fan makes an unmanageable noise.
Therefore, I thought of designing and printing something that could reduce this noise without restricting the airflow.
This is the result I got.

I printed everything in PLA using media using Support W from Bambulab.
I used 2 walls, top/bottom 4 layers, infill 5% and in 2 colors.

Here are the results in terms of noise:

BEFORE

AFTER