Yesterday we prepared the setup (two subwoofer + loudspeaker pairs) located at the DET terrace, all driven by the same DAC, ENV_NOISE_CEB_DetTerrace).

Yesterday afternoon the ITF was unstable and we postponed the injections to today, stealing 1h to TCS shift (Thanks Ilaria and Lorenzo!).

We injected white noise levels in the range 30 to 3kHz::

quiet 1209910736  May09,18-14:18:56 UTC  (May09,18-16:18:56 CEST)

level LOW (parametro "density" = 0.001): 1209911232  May09,18-14:27:12 UTC  (May09,18-16:27:12 CEST)
level MEDIUM (parametro "density" = 0.002): 1209911579  May09,18-14:32:59 UTC  (May09,18-16:32:59 CEST)
level HIGH (parametro "density" = 0.005): 1209911872  May09,18-14:37:52 UTC  (May09,18-16:37:52 CEST)
level MORE (parametro "density" = 0.01): 1209912229  May09,18-14:43:49 UTC  (May09,18-16:43:49 CEST)
level MAX (parametro "density" = 0.02): 1209912576  May09,18-14:49:36 UTC  (May09,18-16:49:36 CEST)

ITF unlocked wile injecting the MAX level, at 1209912702  May09,18-14:51:42 UTC  (May09,18-16:51:42 CET)

Figures 1 and 2 : we see some structures excited between 250 and 500Hz when in the HIGH level which corresponds to about x10 the quiet noise contition in the hall.

Figure 3 shows the MAX level injection that unlocked the ITF after 2 minutes.

Sensor ENV_SR_FLOOR_ACC_Y is one accelerometer attached to the platform near SR rack, we find that the PLATFORM vibration gets very excited.