The answer to 'outlet buzzing noise' is that a buzzing noise coming from an electrical outlet is often caused by a loose or faulty connection. This can be a sign of a more serious electrical issue that requires professional attention.
Some common causes of a buzzing outlet include loose wiring, a problem with the outlet's internal components, or an issue with the circuit breaker or electrical panel. Buzzing can also be a sign of an overloaded circuit or a ground fault. It's important to address a buzzing outlet promptly, as it could be a fire hazard.