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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 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. You can test for this by using an AC “cheater plug” that lifts the third wire ground from the AC receptacle.
Q. How can I permanently stop mains noise in my studio?
https://www.soundonsound.com/sound-advice/q-how-can-permanently-stop-mains-noise-my-studio
If there's still more hum than you expect, it might be due to a nearby 'line-lump' power supply, in which case, you should move this as far as possible from audio cables, and at the very least try rotating it to find the 'quietest' position.
Studio SOS: Mains Hum - Sound on Sound
https://www.soundonsound.com/techniques/studio-sos-mains-hum
By Paul White. Published February 2005. Acoustic problems and mains hum were making Aniff's studio difficult to use, so the SOS team stepped in to help. Aniff Akinola has been working in music for around 20 years and has enjoyed a certain amount of commercial success with his productions, including collaborations with artists such as the late Kirsty McColl, Steve Hillage, …
Hearing An Electrical Hum? Here’s How To Fix It
https://www.theelectricconnection.com/electrical-hum-fix-it/
A mains hum is a term used to describe the audible sound of alternating current. It is common in appliances with motors and occurs when these motors switch on and off. A mains hum is usually harmless but if it gets louder than normal, consider inspecting the appliance. Circuit breakers
Removing Mains Hum - Librivox wiki
https://wiki.librivox.org/index.php/Removing_Mains_Hum
The good news is that 50 or 60Hz are below the normal frequency of the voice, so you can generally remove mains hum without affecting the voice at all. To do this, you need to use a plug-in effect. Identifying the Frequency of your Hum. 1. Select about one second of "silence" (hah!) in your recording. 2. Click Analyze | Plot Spectrum Algorithm: Spectrum
Solving Audio Hum Problems – Electronic Product Design
https://electronic-products-design.com/geek-area/electronics/audio/solving-audio-hum-problems
You are looking for tiny voltages – 5mV at line level is plenty to give you hum, even though your signal of interest is say 1V p-p. Use a scope to identify hum areas by connecting scope ground to different GND points and then measuring other GND points. A good starter is to connect scope GND to the PCB’s GND star point and measure from there.
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...
Electrical Problems: What Is That Buzzing Sound?
https://www.artplumbingandac.com/electrical/electrical-problems-what-is-that-buzzing-sound/
There is a term for an electrical buzzing sound which is referred to as mains hum. This is caused by an alternating current at the frequency of the mains. The sound often has substantial harmonic content at 50 / 60 hertz. Most residential systems in the US operate on a standard 60 hertz (the SI unit of frequency equal to one cycle per second).
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