INTERFERENCE FROM ELECTRIC MOTORS

Electric motor noise is most often generated in small home appliances such as mixers or hair dryers. The small motors used in these types of devices produce a whining type noise that varies with the speed of the motor. They are often shaded pole motors that have a large number of small internal arcs occurring almost constantly. This not only generates noise but it also increases the temperature of the motor and hastens ultimate failure of the motor.

Modern noise blankers can generally do a good job of reducing this type of interference since it is much less random in nature then power-line noise. It can be very difficult to reduce given the design of the motor. The good news is that it generally only lasts for a few minutes and then goes away once the task it is being used for is completed.

Go back