I made a YouTube video showing how to fix humming, buzzing, whining, and hissing noises when using your auxiliary audio input on your car stereo. This is caused by a common ground between the audio source, and the radio in the car. It’s called a ground loop, and you can buy a ground loop isolator to easily fix this problem. The isolator shown in this video was purchased at a Micro Center retail store but they can also be purchased on-line. I included a link under the video to the item on the Micro Center website, and to a similar unit that can found on Amazon.
In the video I demonstrate the ground loop noise with an aviation radio scanner (I am an aviation nerd, lol) but the problem can happen with any audio source like your cell phone or MP3 player (do they still sell MP3 players? lol) that you might have plugged into your 12 volt power port inside your car. Anytime your car radio and your external audio source share the same ground, you could possibly experience “ground loop” noise. Sure, you could just unplug the 12 volt power cord from your phone but then you wouldn’t be able to charge and listen to your music at the same time without listening to that hideous noise. These simple and inexpensive ground loop isolators fix that problem.
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