![]() You can see how a loop is created in the diagram below. In the simplest terms, this creates a single-loop antenna that just loves to suck in various types of noise via electromagnetic induction. ![]() It could also be a much quieter, yet equally annoying buzz or hum that you only hear when the room is otherwise quiet.Ī ground loop in entertainment equipment typically occurs when one or more pieces of equipment are plugged into the AC (alternating current) at different locations, then connected together by electrical (versus optical) signal cables?RCA, HDMI, composite, component?whose shielding is connected to ground. The most common manifestations are a loud buzz or hum coming through the speakers, or scrolling bands on a TV screen. The number-one cause of audio noise and weird video is the ground loop, simply because it?s so darned easy to create. Whatever the type of noise you?re hearing?and whatever the cause?here?s how to get rid of it. Then again, it could be bad wiring, defective equipment, or just a noisy electronic environment. I?d love to tell you that you did nothing wrong, but you may have inadvertently. ![]() So you take it all back to the store, only to watch the salesperson plug it in and have everything work perfectly. You might even see some banding or waves on your TV. So you just unboxed your new entertainment gear, hooked everything up, and you hear a buzz, whine, hiss, chatter, or any number of other annoying noises that have been known to plague audio equipment. How to get rid of hum and eliminate other noises from your audio and video systems
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