The motor noise can be totally eliminated with an upgrade main board from bigtreetech. https://biqu.equipment/search?filter.p.product_type=3D+Printer+Control+B

The motor noise can be totally eliminated with an upgrade main board from bigtreetech. https://biqu.equipment/search?filter.p.product_type=3D+Printer+Control+Board&options%5Bprefix%5D=last&options%5Bunavailable_products%5D=show&q=ender+3 https://biqu.equipment/search?filter.p.product_type=3D+Print... They are drop in replacements for the existing board and are very affordable. I highly recommend them.