Berd-Air Silencer Case

As the Berd-Air pump is quiet loud, I decided to design a silencer.

The silencer uses 3 principles:

1. Decoupling of the pump and soundproof casing
2. Sound attenuation of the air inlet
3. Sound attenuation of the exiting air flow

1. Decoupling and soundproof casing
   The case is sealed from the inside with insulating mats usually used to silence a PC. The pump itself hangs on a mount from the ceiling. The coupling was printed from flexible material to minimize the transmission of vibrations.

1. Sound attenuation of the air inlet
   Since the air intake through the housing resonated similar to a subwoofer, I have insulated the air intake separately. The housing of the air inlet is filled with cotton wool.

1. Sound attenuation of the exiting air flow
   To silence the air coming out, I designed an air vessel. The air vessel is sealed- the air expandes and the sound is trapped in the chamber. I also recommend filling it with cotton wool. To get the air vessel air tight I recommend to print it with a resin printer. Settings:

   Printed "normal" (PLA / PETG):

• Case
• Lid
• Mounting_pump_big
• Mounting_pump_small
• Silencer_inlet_bottom

• Silencer_inlet_top Printed in TPU:

• Sealing_Case

• Decoupling_short
• Decoupling_long
• Sealing_back
• Sealing_front
• Damper_foot
• Damper_foot_top

• Air_vessel_sealing Printed in Resin:

• Air_vessel_resin_print

• Air_vessl_bolt_resin_print Would be happy if you comment or like the design!

  Print Settings

Printer:

Hypercube Evolution

Rafts:

No

No

Resolution:

0,2 mm

40%

Notes:

Print the flexible Mounts just with 1 perimeter, 2 bottom / top layer and 10 % infill to ensure enough flexibility.