VzBoT 330 External/Internal CPAP Muffler

Here is my idea of a small External/Internal CPAP Muffler filled with plaster for the VzBoT 330. VzBoT LED Exhaust Fan Grid on my Instagram: https://www.instagram.com/p/DJm3WbMTf... If you have any suggestions to improve the CPAP muffler, leave a comment, I would be happy to test your ideas. STL links: https://www.thingiverse.com/thing:709... STL files also available on the VzBoT discord Filaments used: Eryone PLA CF Black Recreus FilaFlex 82A Green ** Data collected with the DJI Mic Mini on a iPhone 13 Pro Max at 1m / 3,281 ft ** App used : Decibel dB Sound Meter Ultra Chapters: 0:00 - 0:34 Intro 0:35 - 1:13 Why an Ext/Int Muffler? 1:14 - 2:05 Closer look (External Part) 2:06 - 2:42 Closer look (Internal Part) 2:43 - 3:10 Tests (Noise Level) 2:43 - 3:37 Tests (AirFlow Restriction) 3:38 - 3:55 CAD 3:56 - 5:28 Collected data (Decibel) 5:29 - 7:05 Collected data (Frequencies) 7:06 - 7:30 Collected data (AirFlow) 7:31 - 7:55 Any Suggestions? 7:56 - 11:50 Prints