SONIC BOOM :-A sonic boom is the sound associated with the shock waves created whenever an object travels through the air faster than the speed of sound.
What causes a sonic boom?
CAUSES A SONIC BOOM :- When the aircraft exceeds the speed of sound, these pressure waves combine and form shock waves which travel forward from the generation or “release” point.It is caused by an object moving faster than sound — about 750 miles per hour at sea level.
There are two types of booms:
N-waves:-The N-wave is generated from steady flight conditions, and its pressure wave is shaped like the letter “N.” N-waves have a front shock to a positive peak overpressure which is followed by a linear decrease in the pressure until the rear shock returns to ambient pressure.
U-waves:-The U-wave, or focused boom, is generated from maneuvering flights, and its pressure wave is shaped like the letter “U.” U-waves have positive shocks at the front and rear of the boom in which the peak overpressures are increased compared to the N-wave.
NOTE:-The strongest sonic boom ever recorded was 144 pounds per square foot and it did not cause injury to the researchers who were exposed to it. The boom was produced by a F-4 flying just above the speed of sound at an altitude of 100 feet.
Why are sonic booms illegal?
Breaking the sound barrier leads to a sonic boom. And regulators have determined that people need to be protected from sonic booms.
👳🏻♂️👉Pregnancy : Increased noise levels can cause stress. This can cause changes in a pregnant woman’s body that can affect her developing baby. Sound can travel through your body and reach your baby. Although this sound will be muffled in the womb, very loud noises may still be able to damage your baby’s hearing.
👳🏻♂️👉Animals : The noise can influence the behaviour of farm and wild animals while the variation of pressure in itself could eventually cause physiopathological disorders.
👳🏻♂️👉Humans : The most important effects are the development of startle responses, disturbance of ongoing activities, interference with sleep and annoyance. The information available on the occurrence of these effects is reviewed with special emphasis on dose-response relationships.