I probably should have said this in my original post, oh well.
I've heard three sounds that weren't physical sounds. Two of them are types of high pitched noises that I could conceive of as hearing damage, similar to high pitched electrical whines. One is just a high pitched tone, the other is the "pop, then tone" sound, which really reminds me of dial-up but despite the similarity, I've never noticed any connection between it and hearing spirits or anything. The third sound however, sounds nothing like the hearing damage whine. It sounds like a
. I haven't heard it in a couple of years, but it used to respond to my thoughts. Since I've honed my clairaudience, I don't hear it. That sound, I don't think it's from hearing damage. It wasn't
sometimes connected to my thoughts, it
always was a response to them. I could ask it questions and it would ding, then while I talked to it, it would be silent until I asked another question.
Some advice regarding clairaudience: The ability causes the delusion that you have the ability. By which I mean, telepathy doesn't work like it does in media. You probably know that most of the mind's activity isn't the ego-consciousness stream of narration that we think of as our thoughts. Well, telepathy (better called clairaudience, but it's the same thing IMO, picking up on consciousness outside your own immediate bubble) picks up on the whole mind, not just the ego. In day to day life, it plays out as intuition. So rather than hearing your spouse think "I'm hungry, we should go out to eat", instead you'll just feel like suggesting grabbing a bite to eat. In my anecdotal experience, these intuitive telepathy-moments are more common with close family or friends than with strangers, though that isn't to say it never happens, it certainly seems more common with people you "vibe with", so to say. The thing is, in my (and others I've spoken to) experience, the intuition-thoughts sound the same as your own thoughts. It isn't in someone else's voice. That's what I mean by "the ability causes the delusion that you have the ability". Some thoughts come from others, some are more like echoes of your imagination of what others might be thinking. I can't tell you any hard or fast rule for telling the difference, experience is the teacher here, but with someone like your spouse, you can certainly ask for confirmation.
My personal lesson that I've taken out of clairaudience is that it's not a gift to be shared, at least not for me. Telling people what's on their mind is a parlor trick and easily brushed off as legerdemain (cold reading, misdirection and subconscious prompting, etc.). It doesn't prove anything to yourself or someone else, it just serves the ego by making you appear powerful if you succeed in impressing them. The real benefit is when you're listening to someone and hearing a second level of communication during the conversation. It's hard to describe, but it makes the interaction richer, deeper, more vibrant. It strengthens the connection between you, as long as you allow it.