Hello, first topic in this forum, if this is not the correct sub-forum, I apologize in advance. Well the question is: Is it possible for Felix Baumgatner, to produce an audible sound from earth sonic boom?. Red bull has released what suppose to be that a micro sonic boom from the guy breaking speed barrier. http://www.youtube.com/watch?feature=player_embedded&v=yZFz6y4UCuo The thing is that from what i've research it won't be no possible due that: 1) You can not make a sonic boom if you make no sound. 2) The sonic cone that is formed, the wave is not pouting to ground (unlike the jet wave), because he was facing ground. 3) Even if possible it should be so small that it would be no audible from ground. Well, sorry if it something obvious or the question is not proper formatted according to the forum rules. Thanks in advance.