[BLEEP] YOU!

I wonder if the noise that TV shows use to bleep out swear words is always the same. Is there an industry standard bleep audio clip? And if there isn't, do the people that make their custom bleep noise try to match it to existent bleeps. If you took a sampling of bleeps in the wild, what would the data show with regard to the range of acceptable frequencies and waveforms for a bleep. [BLEEP] if I know....