Constant low hum with headphones plugged in

[MacbookSwitcher]

Hello,

I am experiencing a constant low hum whenever I have my headphones (Apple iPhone earbuds) plugged into my Macbook Pro.

However, the buzz stops when:
1) I unplug the power to the Macbook Pro
2) I physically touch the Macbook Pro

Any ideas on how I can fix this problem? The best I can do now is leave my power unplugged as long as possible, or make sure I always have a finger or hand on the machine. Both annoying workarounds.

Thanks

 

[DMC-12]

Are you using the grounded three-prong extension cord?

 

[micsaund]

From what I've read, using higher impedance headphones is the answer.

A bit more info: https://forums.macrumors.com/threads/446313/

Mike

 

[MacbookSwitcher]

Are you using the grounded three-prong extension cord?

My friend, you are a genius! Plugging in the three-prong extension to the power adapter solved my problem!

P.S. Here in Japan, most outlets are not 3 pronged, however the office I'm in happens to have three pronged outlets. Otherwise, I have to use a three-to-two prong adapter, which I hope will achieve the same effect.

 

[DMC-12]

My friend, you are a genius! Plugging in the three-prong extension to the power adapter solved my problem!

P.S. Here in Japan, most outlets are not 3 pronged, however the office I'm in happens to have three pronged outlets. Otherwise, I have to use a three-to-two prong adapter, which I hope will achieve the same effect.

Thank you, thank you. All in a day's work.