Does this get louder based on the age of a CRT or the different models? I feel like some of the old computer monitors we've had at home varied in noise level. <br><br>Some also started to make a really, really high pitched noise after a while. I'm assuming this is something else entirely, maybe down to a component heating up and changing properties after the screen has been turned on for a while. But I don't know. Does anyone know why that is, or even what I am talking about? :P