Mason From United States of America, joined Jun 1999, 749 posts, RR: 1 Posted (14 years 3 weeks 5 days 8 hours ago) and read 1005 times:
Ok, this lies outside my area of expertise. I'm sure someone here can answer this question. When an aircraft breaks the sound barrier, is there only one sonic boom, or does it travel with the aircraft, creating many sonic booms. I believe there is only one, but I heard somewhere, perhaps on here, that there are many, and that is why the Concorde is not allowed to fly over land at supersonic speeds. Also, is there a sound when the aircraft returns to subsonic speeds? Thanks in advance.
Flyf15 From , joined Dec 1969, posts, RR:
Reply 1, posted (14 years 3 weeks 5 days 8 hours ago) and read 990 times:
The sonic boom is a shockwave which is created by the aircraft, obviously. This shockwave follows the aircraft in a cone shape. The walls of this cone, the shockwave, are quite thin. As they pass over a stationary observer, it appears just to be a quick boom, yet in reality is in fact a sound that travels with the aircraft - it is continuous.
Avratdwc From United States of America, joined Jan 2000, 68 posts, RR: 0
Reply 2, posted (14 years 3 weeks 5 days 8 hours ago) and read 982 times:
Hey man that is a good question. As far as I know from the books that I have read, the shockwave travels along the trailing edge of the wing causing a cone shape around the back of the aircraft. This shockwave always is going yet we only hear it when we are stationary since it is rather small and it moves back. Well man I hope that this helps a little.