laminate flooring & surround sound
Most solid surfaces will reflect sound, especially the higher frequencies, before it gets to the insulation behind it. For a real easy explination, look at the inside of a movie theater. Carpeted floors, textured walls and acoustical ceilings. The big trick is that you don't see BEHIND the walls. The major effort there is to prevent any intruding sound from the outside while at the same time providing a certain amount of absorbtion and reflectivity on the inside.
In critical applications, such as syphonies, womens fashions can affect the sound. When hemlines go up, bare legs reflect more sound than covered legs. Yes, it can get that critical.