That noise is a <b>wonderful</b> noise when you're a kid in school, and you can hear that you're going to be watching a video instead of regular, boring class.,(reply>), From 20 years ago:  "Where's dad?" "He's upstairs, watchng TV.  I can hear it."  "I don't hear anything, is the volume loud up there?" "No, I can hear the TV being on, that whine."<br><br>Through the door, down the stairs, to the living room, I could hear that the TV was on.,(reply>), i never had that problem in school, but those stupid mosquito repellents were sooo annoying...,(reply>), haha, this. Back in the day, I remember walking to class with some friends and way before we even reach the door, I'd be like, "yes, we're watching a video today," and they're wondering how I knew.,(reply>), You mean overhead projectors?,(reply>), Yeah, how many times did I have to ask the teacher to shut the TV down because they had used it in a previous class. They had no idea it was even on, they couldn't hear it, they usually thought I was mad until actually pressing the button and seeing the light thing when they shut off.