I was seeing a lot of vibration dampening feet, or people with foam under their printers, or other methods of silencing their printer.
I have taken the designs of bernbout and kb3lnn and combined them so that you can easily out vibration dampening feet under your GEEETech i3 Pro B without making modifications to it to actually mount something to them.
These feet together with the decoupler rings for the stepper make the printer very quiet.
The only sound coming from the printer now are the noises from the fans.
Try the new V2 of this design
print everything once, except for the parts for the front, those are indicated with "Anti-Vibration Feet - Damper/Feet - FrontLR.stl".
These need to printed 2 times each, as the front parts are identical and are just "mounted" the other way around.
Use a M4x6mm nut and M4 bolt to fasten the feet together with the damper.
Then just slide the part under the correct corners and you're done.