Hum disappears on touching both strings and cable? What is the issue?



Asked by: Brian Fiedler

Why does my guitar stop humming when I touch it?





If your guitar stops buzzing when you touch the strings, or any metal parts connected to its electronics, then you’re most likely experiencing grounding issues. You’ll need to sort out whether the issue is in your guitar, your amp, or the electrical outlet your rig is plugged into.

Why does the hum stop when I touch the strings or input jack?

Q: Why Does The Hum Stop When I Touch The Strings or Input Jack? Your guitar’s strings, bridge and jack are are all connected together in a ‘ground loop’. This means when you touch your strings, bridge, jack or metal volume/tone knobs, your hand and body also become connected to the ground loop.

Why does my guitar buzz until I touch the strings?

If the amplifier isn’t properly earthed, you yourself act as the earth connection – but only when you touch the metalwork on the guitar. That’s why you get the hum when you’re not in contact with the strings.

Can guitar cables cause hum?

According to Ken from Yorkville, there are two main reasons why a cable can cause humming or buzz: one is due to bad solder connections, which occurs from repeated usage, which ends up creating an intermittent short and thus a grounding issue.

How do you fix a humming guitar?





To remove buzzes between guitar notes, try a noise gate. If the hum stops when the player touches the guitar strings, ask the player to keep his or her hands on the strings, or run a wire between the player’s skin and a ground point on the guitar (such as the strings or the jack ground.)

How do you fix a guitar that has a ground problem?


All of the metal parts should be connected with a wire in order to have the ground fulfilling its function as soon as that's not the case you will have this really loud annoying bus.

How do I know if my guitar is grounded?

Usually that ground point will be the back of a pot or the sleeve of the output jack. When it’s properly grounded, you can touch the strings of your guitar and you’ll usually hear the background hiss reduce. Yay. There’s a common misconception that by touching the strings you are grounding the guitar.

How do you test a guitar ground?

Checking Your Guitar’s Grounding



Touch the probes to a guitar string and the ground section of the output jack. If you hear a clear beep then your ground is good. If not then it’s time to check all of your wiring, making sure that all solder-joints are nice and solid.

What causes amp hum?

More often than not, when your amp is making a humming sound, it’s caused by dirty power, a bad ground connection, or fluorescent lighting. Below are a few things to consider when dealing with this pesky hum.



How do I know if my guitar cable is bad?

You hear it scratch crackle pop it cuts in there now that means that the conductor on the ground are pretty much touching each other. And this problem could be in the connector.

How do I get rid of the hum on my electric guitar?

Shielding the electronics cavity inside the guitar can help fight this noise; it can be done with shielding tape. Try a few cables to see if the noise increases or decreases. Some cables are better at rejecting noise than others.

What causes ground loop?

A ground loop is formed when there is more than one conductive path between the “ground” terminals on two or more pieces of equipment. The conductive loop forms a large loop antenna that picks up interference currents easily.



How do I stop my ground loop humming?

The ground loop can be eliminated in one of two ways:

  1. Remove one of the ground paths, thus converting the system to a single point ground.
  2. Isolate one of the ground paths with an isolation transformer, common mode choke, optical coupler, balanced circuitry, or frequency selective grounding.


How do I stop ground loop sound?

So if your audio interface doesn't have balanced outputs you'll need something else which brings us to solution number three which is use a ground loop isolator.

How do you prevent ground loop noise?

Power inter-connected equipment from different AC outlets is likely to create a ground loop: The ground will travel through the shielding of the signal cables. Anything that breaks the loop will remove the noise, and the easiest way to do it is to power everything through a single AC socket.



What does ground loop noise sound like?

So what exactly is ground loop noise. Well it usually occurs when you have multiple devices linked together through signal cables. And plugged into different power outlets which induces multiple