CPAP Muffler dB and Air Flow Test - Mammoth-3D: Comprehensive Analysis

Mammoth-3D CPAP Muffler: Reducing Noise by 13 dB with 100% Airflow for 3D Printing Part Cooling
The Mammoth-3D CPAP Muffler is specifically designed to reduce the noise generated by the cooling fan (24V Brushless Centrifugal Air Blower DC WS7040) in 3D printers, while ensuring that the airflow required for effective part cooling is not compromised. Here’s how the muffler achieves a noise reduction of 13 dB and maintains 100% airflow:
Noise Reduction Mechanism
1. Sound Absorption Materials:
The muffler incorporates advanced sound-absorbing materials that dampen the noise produced by the part cooling fan (Air Blower). These materials absorb sound waves rather than reflecting them, significantly reducing the overall noise level.
2. Acoustic Design:
The design of the muffler includes internal baffles or chambers specifically configured to disrupt and attenuate sound waves. This sophisticated acoustic design helps in reducing noise without impeding the airflow needed for cooling.
3. Precision Engineering:
The precision afforded by 3D printing technology allows for the creation of intricate internal structures within the muffler. These complex geometries optimize noise reduction by creating pathways that minimize sound transmission, effectively lowering the noise by 13 dB.
Maintaining 100% Airflow
1. Aerodynamic Pathways:
The muffler is designed with aerodynamic principles to ensure that air passes through it smoothly and with minimal resistance. This careful design minimizes turbulence and ensures that the cooling fans can operate efficiently.
2. Large Cross-sectional Area:
By providing a sufficiently large cross-sectional area for air to pass through, the muffler ensures that there is no obstruction to the airflow. This allows the cooling fans to deliver the required airflow for effective part cooling in the 3D printing process.
3. Minimized Back Pressure:
The internal design of the muffler is optimized to minimize back pressure, which is the resistance against the air being pushed through the system. By reducing back pressure, the muffler ensures that the airflow remains consistent and effective, providing the necessary cooling for the 3D-printed parts.
Summary
The Mammoth-3D CPAP Muffler leverages advanced materials and precise engineering to achieve a balance between noise reduction and airflow maintenance for 3D printing part cooling. By employing sound-absorbing materials, optimizing acoustic design, and utilizing the precision of 3D printing, it effectively reduces noise by 13 dB. At the same time, its aerodynamic pathways, adequate cross-sectional area, and minimized back pressure ensure that it maintains 100% airflow, ensuring efficient cooling of the printed parts without additional noise disturbance.
github.com/mammoth-3D/Mammoth...
www.printables.com/model/9356...
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[@sirmissalot8065]

already have the whole muffler assembled, i'm just waiting for the pcb for my new xolpap toolhead to arrive

[@mammoth-3D]

That's awesome!

[@xandersnyder7214]

Just finished printing the muffler, but had to order cut to fit foam since we didn't have the aquarium filter that you had listed.
Really easy print, but I think I am going to remix the grill to use a PG7 with strain relief for the CANBUS cable.
Can't wait to install it this weekend!

[@mammoth-3D]

Thank you very much for your feedback! Are you in the US? Tasking so that I can look for something similar and update the BOM.
Gut do it 😀👍🏻 I love remixing as I do it all the time. Have a look on the mammoth-3D GitHub all the CAD files are online 🤩

[@BrianVoelker]

Nice job! Love mine!

[@mammoth-3D]

That is awesome! Do you use the Fish Filter? Or magic cleaning pads?

[@grahamcracker659]

this is very scare, my cat is sad

[@EpicTimeV7]

Great job 👍

[@mammoth-3D]

Thank you very much!!

[@3DWolfEngineering]

awesome video !
planning on CPAP, def. gonna keep it in mind !

[@mammoth-3D]

That's cool! I will never use CPAP without the muffler again :-) www.printables.com/model/935635-mammoth-3d-cpap-muffler-version-135

[@3DWolfEngineering]

@@mammoth-3D thats for sure ! Dont wanna get deaf 😅
Just i would need a evem better muffler with more silencing (will try developp that then i guess) as its not in a seperate room..
Thank you for the awesome work you already did thats already a huge inprovement in noise

[@mammoth-3D]

@@3DWolfEngineering Yes I understand. Well it's just the first step to show what can be done. The more people that work on it the better ;-)