Question:

What are the possible causes and solutions for a sound bar that produces a humming or feedback noise intermittently?

I have a sound bar that has been working fine for more than a decade, but recently it started to make a loud and annoying noise randomly. I tried replacing the 3.5mm aux cable that connects it to my computer, but the problem persisted. The noise occurs whether I use headphones or not. I want to know what is causing this issue and how I can fix it.

Answer:

A sound bar is a device that enhances the audio quality of your computer, TV, or other devices. It usually consists of a long speaker that can be placed under or above the screen, and sometimes a subwoofer that adds bass. A sound bar can provide a more immersive and realistic sound experience than the built-in speakers of your device.

However, sometimes a sound bar can also produce a humming or feedback noise that can ruin your listening pleasure. This noise can be intermittent or constant, and it can vary in intensity and pitch. It can also occur regardless of whether you use headphones or not. This noise can be very annoying and distracting, and it can also damage your sound bar or your hearing if it is too loud.

There are several possible causes for this noise, and each one has a different solution. Here are some of the most common ones:

• Ground loop: A ground loop is a situation where there is a difference in the electrical potential between two devices that are connected by a cable. This can create a loop of current that flows through the cable and the devices, and this can cause a humming noise. A ground loop can occur when your sound bar and your computer are plugged into different power outlets, or when they have different grounding systems. To fix this, you can try plugging both devices into the same power outlet, or using a ground loop isolator that can break the loop and eliminate the noise.
• Interference: Interference is a situation where an external source of electromagnetic or radio waves affects the signal that is transmitted through the cable. This can cause a buzzing or static noise. Interference can come from various sources, such as power cords, wireless routers, cell phones, microwaves, or other electronic devices. To fix this, you can try moving the cable away from the source of interference, or using a shielded cable that can block the unwanted waves.
• Faulty cable: A faulty cable is a situation where the cable that connects your sound bar and your computer is damaged, worn out, or defective. This can cause a crackling or popping noise. A faulty cable can be caused by bending, twisting, or stretching the cable, or by exposing it to extreme temperatures or moisture. To fix this, you can try replacing the cable with a new one, or using a different type of cable, such as an optical or HDMI cable, that can provide a better quality of sound.
• Faulty device: A faulty device is a situation where the sound bar or the computer itself is malfunctioning or broken. This can cause a hissing or whistling noise. A faulty device can be caused by various factors, such as overheating, dust, water damage, or physical impact. To fix this, you can try cleaning the device, resetting the device, or contacting the manufacturer for repair or replacement.

These

are some of the most common causes and solutions for a sound bar that produces a humming or feedback noise intermittently. However, there may be other factors that can affect the performance of your sound bar, such as the settings, the volume, the placement, or the compatibility of the devices. Therefore, you should always consult the user manual of your sound bar and your computer, and follow the instructions and recommendations that are given there. If none of the above solutions work, you may need to seek professional help from a technician or an expert.