Hotend 40mm Fan Shroud with baffles (noise reducing)

The original model only claimed a -3dB decrease in noise. Edited the model to introduce some scalloping in the main intake barrel. 

My original replacement case fan clocked in at a whopping ~70dB at about 2 inches and 60dB at the desk 3 feet away. After printing this initial prototype, it had reduced to 58dB at 2 inches and 46dB at the desk 3 feet away.
 

v3: Added more pronounced chambering in the main intake barrel and baffles in the output channels. Baffles may be removed after further testing.

I plan on continuing to modify this file and will upload improved versions here.