@Richman
There are almost as many explanations for the Clark Kent/Superman identity disparity as there are writers of the series. In addition to the "waves" thing, some writers have said its because he carries himself so differently between identities (like, Clark is actually an few inches shorter than Supes) and have different voices, that Kent is so unnoticeable that his features don't really stick in most people's memories, that people can't believe that Superman would ever bother being a normal human so don't even think of making the comparison, etc., etc.