Is room treatment a science?

Yes, it’s a science. Reading the books and asking experts is always a good approach.

A few easy tips:
- “ slap echo” just means clapping your hands in center of room and
     listening for echo.
-if a ping pong ball will bounce off a surface so will sound.Glass 
 sucks.
- wool rugs work.
- book shelves on side walls with uneven books break up
  waves and work.
- try closing doors.