The answer to 'why is my surge protector buzzing noise' is that a buzzing or humming sound from a surge protector is usually a sign of an internal electrical issue. This can be caused by a malfunctioning component, loose connection, or other problem within the surge protector itself.
A buzzing surge protector indicates that the internal circuitry is not functioning properly and the device may not be providing effective surge protection. In some cases, the buzzing can also be a sign that the surge protector is overloaded or about to fail. It's important to address this issue promptly to ensure your electrical equipment remains safe and protected.