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How to Fix Static Noise From Car Speakers While Using The Aux Cord

No road trip is complete without music. Be it a routine drive to work or a road trip, good music via the AUX system will always be essential. Unfortunately, you immediately start hearing unpleasant static or buzzing sounds once you start charging your phone. 

You will for sure get annoyed enough to pull over and see what’s the matter with your car’s stereo. What’s even more annoying is realizing that the root cause of this irritating sound is charging your smartphone using the car’s built-in cigar charging port. Well, no matter how much you twist and turn the AUX cable, it won’t fix this issue until you disconnect your phone from the charger. 

But that is not the solution because without charging your phone’s battery, the time you can keep listening to your songs is limited. So how can you escape this predicament? Well, we’ve got your back. In this guide, we have listed three ways you can stop the static noises from the AUX while charging your phone via the car’s cigarette lighter.

But why is this happening? The most common reason for hearing a weird static disturbance on the car’s stereo is the ground loop problem. Let’s dig a little deeper into what it means and how can we fix it. 

The Ground Loop Effect

A ground loop could be the most likely reason if you suddenly hear an annoying noise springing from your car stereo. This may not be present in all cars, but it is very common to get this issue, especially when using an AUX cable to stream your music. 

A ground loop occurs when the two components of your car stereo get anchored in places with different ground potentials. Whenever this happens, it causes a potential difference, resulting in the interference in your songs that you hear as a humming, buzzing, or hissing noise. 

However, hearing an interference on your car’s stereo doesn’t always boil down to the ground loop problem. Yet this problem is definitely one of the most common culprits when it comes to creating unwanted issues with your car’s stereo system. 

So to solve the ground loop issue, you need to balance the potential difference by establishing a proper ground connection. Sounds too technical for you? We don’t blame you. Don’t worry because we have also listed two easy ways to fix this issue. 

How to Fix the Ground Loop Noise Effect in Your Car?

Solving a ground loop problem isn’t rocket science, and you can pull it off on your own. Here are three different approaches that you can try. 

Use a Ground Loop Noise Isolator 

As we mentioned above, this problem occurs when there is a potential difference between the phone and your car’s stereo. So what if you could suppress this potential difference? 

Yes, this is possible by using a Ground Loop Noise Isolator. It is a tiny device that acts as a bridge between the phone and the stereo. You can think of an auxiliary cable extension with a very small transformer in between. All you have to do is one end of this cable to your phone’s audio jack and the other one to your car’s stereo. 

Your phone sends the audio to the transformer in the form of electric waves, and the transformer converts it into magnetic waves. These magnetic waves are then converted back to electric waves, but this time the excess electricity is neutralized. So now you can charge your smartphone and connect it to the stereo at the same time.

Lucky for you, you don’t have to hunt down the best Ground Loop Noise Isolator available in the market because we’ve already done that for you. It’s the BESIGN Ground Loop Noise Isolator.

BESIGN Ground Loop Noise Isolator

BESIGN Ground Loop Noise Isolator
  • Compatible with all 3.5mm jacks
  • Does not require batteries and/or charging
  • 20cm cable

Last update on 2023-06-02 / Affiliate links / Images from Amazon Product Advertising API

This ground loop noise isolator is crafted to be as lightweight as possible and weighs only 0.8 ounces. It has a tiny form factor and measures 8 inches in length. The transformer is known neatly packed in a tiny enclosing known as the fob, which measures 3.5 inches. 

Overall, using an isolator is the easiest way to get rid of the annoying buzz and hum sounds from the stereo.

Use a Noise-Canceling Bluetooth Aux Adapter

Another option you can consider is getting a noise-canceling Bluetooth AUX adapter. With this, you can say goodbye to sound interruptions when you’re using the AUX cable while charging your phone at the same time as you can wirelessly connect your phone to your car via BlueTooth. 

No, you don’t need to have BlueTooth functionality in your stereo system. This adapter has an inbuilt BlueTooth receiver that wirelessly connects your smartphone to your car’s stereo.  It comes packed with a Bluetooth 5.0 chip that guarantees you a stable connection, rapid transfer, and a broad signal range. Simply pair your smartphone with this receiver, and you’re good to start streaming your favorite music without any interfering noises.

COMSOON Bluetooth 5.0 Noise-cancelling Adapter

COMSOON Bluetooth 5.0 Noise-cancelling Adapter
  • 16h battery life
  • Compatible with all 3.5mm jacks
  • Bluetooth 5.0

Last update on 2023-06-02 / Affiliate links / Images from Amazon Product Advertising API

Take our word for it, the COMSOON Bluetooth 5.0 Noise-cancelling Adapter is one of the best Bluetooth adapters in the market. It features the most advanced CVC8.0 Noise Cancellation and Digital Signal Processing, which eliminates echo and filters out distracting background noise like wind, traffic, or crowds. This ensures crystal-clear music streaming and calling in your car.

The COMSOON Bluetooth adaptor has a massive battery life of up to 16 hours, so you don’t have to worry about charging it every now and then. You can also pair two devices simultaneously, which it recognizes and quickly connects with the next time they come in range.

It also comes with a built-in microphone and one “MFB” button that lets you accept, reject or answer calls without diverting too much of your attention from the road. You can also use it to broadcast your phone’s notifications, so you don’t have to look down at your phone while driving. So if you’re looking for an easy way to fix audio static or humming noises, getting a BlueTooth audio adapter is a wise decision. 

Use a Power Bank

The simplest and most straightforward solution to your problem would be, to use a power bank to charge your phone in the car. When you use a power bank, your phone is no more plugged into the cigarette lighter/charging port which automatically eliminates the potential difference that causes the ground loop noise isolation effect.

Now you can get both your purposes of listening to music and charging your phone be served, without hearing unnecessary stereo whines or buzzes. However, the benefits of using a power bank are not just limited to eliminating unwanted sounds from your car’s stereo. 

You can carry it anywhere with you to charge your smartphone, even outside your car. If you’re traveling long distances, you must always carry a power bank with you in case of emergencies. In fact, you can also use it to charge a wide range of devices like cameras, smartwatches, tablets, and even flashlights. 

Power banks come in all different kinds of shapes, sizes, capacities, and price ranges. Check out our buyer’s guide to find the perfect charger for you.


Noise problems are undoubtedly very frustrating for everyone. Especially if you get yourself a new amplifier or stereo system, but can’t enjoy it due to the annoying sounds coming out of it. Luckily, the solutions we’ve mentioned in this article will surely help you stream your favorite tracks without any persistent interruptions. 

Feel assured to use the devices we’ve suggested for a smooth musical journey. However, you can use the same solution to fix this issue in any other speaker system as well. 


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