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Mains hum - Wikipedia
https://en.wikipedia.org/wiki/Mains_hum#:~:text=The%20other%20major%20source%20of%20hum%20in%20audio,that%20a%20small-signal%20device%20is%20also%20connected%20to.
How to find and fix hum in 3 easy steps - PS Audio
https://www.psaudio.com/ps-how/how-to-find-and-fix-hum/
If it’s a ground loop. If the hum is caused from the cable TV connections, or internet connections, you can use PS Audio’s HumZero. If it is not a cable TV causing the problem, it may mean there’s a power ground loop between the two pieces of equipment.
The Hum, a worldwide mystery sound explained | KALW
https://www.kalw.org/news/2021-11-01/the-hum-a-worldwide-mystery-sound-explained
The Hum, a worldwide mystery sound explained. An image of the Worldwide Hum Map, a catalogue of reports of The Hum around the world. The Hum is a mysterious low pitch noise that bothers up to 2% of people worldwide. It’s been annoying residents in San Francisco's Sunset District, where recently there’s been an outbreak of reports.
How to get rid of hum and other noises from your audio ...
https://www.techhive.com/article/582313/how-to-get-rid-of-hum-and-eliminate-other-noises-from-your-audio-and-video-systems.html
The number-one cause of unusual audio noise and weird video is the ground loop, simply because it’s so darned easy to create. The most common manifestations are a loud buzz or hum coming through...
Why Your Preamp Hums and How to Fix It
https://hometheateracademy.com/preamp-hum-fix/
Usually, the hum emanates from your speakers and caused by a ground loop. This is the most common reason for the humming noise, and fortunately, the easiest to solve. Another reason for the humming noise emanating from your speaker could be your transformer, bad wiring, or defective equipment.
Bah! The Subwoofer Hum Bug, and How to Stop It-- Blue ...
https://www.bluejeanscable.com/articles/subwoofer-hum.htm
Induced 60-Hertz noise is hum that comes into your audio system through contact or proximity to power circuits or cables. While this can happen internally in your devices, the more common cause is bad routing of cables.
Mains hum - Wikipedia
https://en.wikipedia.org/wiki/Mains_hum
In the realm of sound reinforcement (as in public address systems and loudspeakers), electric hum is often caused by induction. This hum is generated by oscillating electric currents induced in sensitive (high gain or high impedance) audio circuitry by the alternating electromagnetic fields emanating from nearby mains-powered devices like power transformers.
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