My first clairaudient experiences started when I was about 7 or 8. I'd clairaudiently hear people talking -- oh lord, voices in my head! --often and it used to irritate me. Anyway, what you're talking about is a bit different in that it sounds like you're experiencing other dimensional bleed-throughs which as been increasing dramatically over the past few years, along with other things. Some have been clairaudiently hearing different tones, beautiful bell(s), voices saying our names and other unrecognizable nonphysical sounds all around us. Simply put, the Veils are gone and we're adapting or more correctly evolving.