13 17 14 18 15 19 16 20 Fig. 17: Bass traps and wall absorbers. Fig. 13: Dried polyurethane needs to be tidied up. Fig. 14: My assistent Olli is applying glue that will affix the felt carpet. Note the cell phone that is in danger of being permanently affixed to the floor. Fig. 15: Extra care has to be taken to prevent sound leaking through the cable tube that goes through the walls. Fig. 16: The walls and the floor are completed. Bring in the gear! 20 RECORDING JUNE 2011 Fig. 18: I used some leftover building materials to build stands that will hold acoustic panels on the window sill. Fig. 19: The complete acoustic panels on the window. Fig. 20: Here are the correction curves produced by the ARC measurement system. The orange curve represents the actual frequency response measured in and around my normal listening position. The white line represents the corrected curve, which is reasonably smooth from 20 Hz to 20 kHz.