text: are quite prone to sharp dynamic stresses and, 
  residual 
  when .superimposed on 
  stresses common to the products and building 
  construction, slight but insignificant damage 
  may result. Actually, 
  the most objectionable 
  feature of the sonic boom is the audibility and 
  the anxiety or apprehension caused by the 
  sharp, loud noise which resembles a blast. 
  
  the ship. When the airplane slows to sub- 
  sonic, the shock wave travels out ahead of the 
  airplane in a form which is somewhat spheri- 
  cal. Because there are density variations 
  through 
  the shock wave, the shock wave 
  moving ahead of the airplane can cause aber- 
  rations in light waves and it may appear.to 
  the pilot as if a large sheet of clear cellulose 
  In 
  or plastic were in front of the airplane. 
  addition, 
  the density variation and initial 
  shape of the wave leaving the airplane may 
  cause reflection of sunlight which would 
  to the 
  appear as a sudden, brilliant 
  pilot. 
  
  the high 
  
  The pressure jump through the shock waves 
  in the immediate vicinity of the airplane is 
  the 
  much greater 
  audible “booms” 
  Thus, 
  airplanes in close formation at supersonic 
  speeds may encounter considerable interference 
  between airplanes. 
  to eliminate 
  even the most remote possibility of structural 
  damage, a high speed airplane should not 
  make a supersonic pass close to a large air- 
  plane which may have low limit 
  load factor 
  and be prone to be easily disturbed or damaged 
  by a strong pressure wave. 
  
  “flash” 
  
  In addition, 