Printer Jittering

Hello everyone, I need help.

My second Mendel printer is jittering, and I think it's related to the speed (the faster the speed, the more it jitters). Yesterday I looked it up online and found it's a stepper motor noise issue.

Is there any way to reduce this noise? I remember my first printer used shielded cable, and I even added a bent stainless steel plate where the cable came out of the stepper motor.

Any suggestions and help would be greatly appreciated.