I just finished creating a set of burst test files for subwoofers. Each file has a 6.5 cycle shaped tone burst, (0.5-0.5*cos(2*pi*f*t/6.5))*sin(2*pi*f*t).
The frequencies the bursts span are 16Hz - 256Hz in 1/6th octave steps.
Each file is 1.00 seconds long with a single 6.5 cycle burst at the beginning.
If somebody can host the files I would be glad to send the full set of 25.
Thes files should be good for exploring the energy storage in your subwoofers and room.
Smeared bursts would indicate the level of energy storage and reflections in the subd and room.
Just play them on your sub and record the sound. Then open a waveform viewer.
I just play the file on repeat and use the Omnimic oscilliscope to watch as I change volume and mic location.