I can relate to this. Some of the things I hear I just ignore because they're either too bizarre, downright nonsensical or just plain funny. I normally hear words or phrases which evolve into a maelstrom of chants which I can become totally absorbed in for minutes. I only normally give them attention if they affect me in some way emotionally. Sometimes the chants may evolve into new phrases or just remain as they were but get louder and louder. Most of mine normally occur just before that eerie shift into 'the void', that majestic expanse of quietude. Last night I had the most nauseating experience (whilst in the void) of my body elongating. I felt asif my whole body (apart from my head) had been stretched miles below me.