Linksys dB of Loss in Construction

WINDOW IN BRICK WALL 2dB
METAL FRAME, GLASS WALL INTO BUILDING 6dB
OFFICE WALL 6dB
METAL DOOR IN OFFICE WALL 6dB
CINDER WALL 4dB
METAL DOOR IN BRICK WALL 12.4dB
BRICK WALL NEXT TO METAL DOOR 3dB