For example, we know that Alpha waves - between 7 and 13 Hz - are associated with relaxation and drowsiness. This is a phenomenon discovered in 1839 and investigated further in the 1970s, which claims that playing audio at certain frequencies can move the activity of your brain waves towards those frequencies. The sounds they're listening to are infused with 'binaural beats'. So here's the reality of the situation: your children are not getting high from listening to audio.
After an initial brief 'lol', I've been trying hard to ignore it, but it seems to be gaining more and more attention from supposedly serious newspapers. For the past couple of weeks, a story has been working its way through various media organisations about kids in a high school in Oklahoma listening to MP3 files and getting high.