I've also been experiencing problems with my t lately, last week I think I had this random new hissing tone that would pulsate, and now that I have a cold it has gone berserk.
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@Slimer976 its like T changing tone season right now .. so annoying lol, hope you recover from your cold :)
@Strawberryblonde i wonder if there's a deeper meaning to it, maybe muscle tension? Who knows