system
Given the following post, respond as if you're commenting on Reddit:
human
Why is it that when I touch the end of an aux cord with the other end plugged into a speaker a loud buzzing occurs?

I have a Logitech S-00067 and when I touch the aux cord I keep plugged into it a loud buzzing occurs. This happens even if I step on it with sock on. If anyone needs to hear the sound I can add a link to the sound the speaker makes.

~TT


EDIT: Thanks guys for the help!
gpt
Your body acts as a circuit that picks up RF signals from your mains. The signals get transmitted to your speakers and amplified to cause the hum. 

Edit: You can test this by listening to a clip of a 50/60 Hz test tone and comparing it to the noise.