I am using the “37D mm metal gearmotors with encoders and end caps” on my custom robot. My robot is also using sensors to detect an invisible dog fence radio signal. When I drive the motors, a lot of noise is picked up by my sensors. I have found that surrounding my sensors with steel sheet metal can block the noise while the motors are driving. This proves to me the source is EM radiation from the motors or from the wires powering the motor. Do you have any suggestions for how I should attenuate this noise? Is the noise source more likely to be the wires or the motors? If it helps to know, my sensors are designed to detect an 11kHz radio signal.