_____ is when a sound wave bounces off a surface back into the medium from which it came.

• farestanner1p0yp1n: Correct answer is, Reflection
  
  
• JemdetNasr:

  Reflection is when a sound wave bounces off a surface back into the medium from which it came.

  by definition reflection is the process of change in direction of the wave from a surface at the same angle as it hit the surface. after reflection the wave goes back into the same medium as it came from. also the angle of the wave with surface before and after striking the surface remain same.