For the lazy who were hoping to find an audio clip in the article: you can find some here: http://www.sigidwiki.com/wiki/The_Buzzer_(ZhUOZ_MDZhB_UZB76)
Maybe there are practical reasons in this case; maybe the sound is memorable, or recognizable even with marginal reception, etc.
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It looks like the site doesn't get such a large number of people very often and the CPU load is getting too high to hear anything clearly. For clearer audio of the buzzer check here: