Term for buzzing or hissing sound often created by vibration

Specifically, I am referring to the hissing, buzzing, S-like, or fuzzy sound that is created when electronic speakers play sounds or music near their volume or frequency limits.

I recall having learned a term for this at some point in the recent past, but cannot remember it despite significant time spent searching online. If I recall correctly, this is a sound produced within the speaker, not just sound caused by the speaker vibrating adjacent objects.

Sibilance is a word for that type of sound. It tends to be caused by aliasing of frequencies that are above the range of human hearing.

Perhaps you are looking for "white noise"?