I recall, back when I was a kid (age 8 to about 12) when people would speak aloud to me, but really relating to me emotionally, that I would occasionally get a "hum" in my 3rd-eye region that was so strong, it would seem to be audible.
It would get so strong that, at times, I would completely miss what the person had said to me. the vibration was all I could hear.
A friend of my dad's, a "jokester" and a real people lover once actually ended his sentence by placing his hand directly over my 3rd eye, as if to cover up the noise, and said, "are you listening to me?"
But that was many moons ago, and to quote
Billy-Bob Thornton,
"...and I ain't heard from that inner child sumbitch since."
Fred