I recently noticed that if I put on something extremely hard or caustic - some kind of screamy metal like Protest the Hero or Tool - and turn the volume up to the point where I can't hear anything else, I stop noticing the music altogether. It kind of feels like it puts my auditory nerve on overload and everything gets filtered out.
The intense, ear-crushing metal also confers the added bonus of warding away pesky human distractions.
The intense, ear-crushing metal also confers the added bonus of warding away pesky human distractions.