
As long as you're talking about a dynamic driver (as opposed to electrostatic or BA), the sound is produced by electromagnets moving the diaphragm.
What are you running them out of? Because if you're using the headphone jack on your computer, you could be getting interference from the other electronic components inside. My old laptop used to have a horrible problem with this; when no sounds were playing, you could hear constant light static and electronic noise.
It was my laptop but it sounds like there is more noise than before, a song that sounded amazing earlier that day sounded like was a bad quality song? It's better on my phone but still not as it was, could using them too loud Hurt them?










