system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What's the ringing in my ears when everything is silent?
gpt
It sounds like you're describing tinnitus. 

Yes, almost everyone experiences it at some point. For some, it's transient and not bothersome, but for others it can be constant and quite intrusive. It can take several forms, such as a single high pitched frequency, chirping similar to cricket noises, or even be pulsatile. Not everyone hears it at the same frequency and there are actual tests an audiologist can do during a tinnitus evaluation to determine the frequency of the particular tinnitus you experience.