Here is the timetable (Local Time)
Level of Monitor speakers: HALF range
Level of Sub-woofer amplifier: FULL range
The DAC output goes to ALL inputs in parallel.
Noise is bandpassed (10Hz --> 2kHz)
Quiet time:
Aug28,17-09:04:57 -> GPS: 1187939113
Aug28,17-09:15:35 -> GPS: 1187939751
---
DET terrace (see figures)
Noise level 0.0001
Aug28,17-09:34:58 -> GPS: 1187940914
(no visible noise seen in INJ and DET lab microphones)
Aug28,17-09:45:03 -> GPS: 1187941519
Noise level 0.0003
Aug28,17-09:46:15 -> GPS: 1187941591
Noise visible in ENV_EDB_MIC (from 300 to 1000Hz)
Aug28,17-09:56:16 -> GPS: 1187942192
Noise level 0.001
Aug28,17-09:56:57 -> GPS: 1187942233
Noticeable increase in ENV_EDB_MIC (from 50 to 2000Hz)
Aug28,17-10:07:01 -> GPS: 1187942837
Noise level 0.003
Aug28,17-10:07:50 -> GPS: 1187942886
Visible noise in B7_DC also
Structures in DARM
Some glitches in B7_DC
Aug28,17-10:17:56 -> GPS: 1187943492
Noise level 0.006
Aug28,17-10:18:14 -> GPS: 1187943510
Level is very high (B7_DC really noisy)
DARM noisy
Increase of noise well visible in DET and INJ microphones
Aug28,17-10:22:32 -> GPS: 1187943768
ITF need some time to recover: Aug28,17-10:23:35 -> GPS: 1187943831
---
System moved to SE corner, just below ENV_CEB_MIC (see figures)
Noise level 0.0001
Aug28,17-10:50:09 -> GPS: 1187945425
Aug28,17-11:00:10 -> GPS: 1187946026
Noise level 0.0003
Aug28,17-11:01:40 -> GPS: 1187946116
Aug28,17-11:11:45 -> GPS: 1187946721
Noise level 0.001
Aug28,17-11:13:08 -> GPS: 1187946804
Visible noise increase in ENV_CEB_MIC (from 50 to 2000Hz)
Little noise increase in DET and INJ mic (from 200 to 2000Hz)
Aug28,17-11:23:11 -> GPS: 1187947407
Noise level 0.003
Aug28,17-11:25:15 -> GPS: 1187947531
High increase of noise in ENV_CEB_MIC (from 30 to 3000Hz)
Little noise increase in DET and INJ mic (from 100 to 2000Hz)
Aug28,17-11:35:18 -> GPS: 1187948134
Noise level 0.01
Aug28,17-11:35:41 -> GPS: 1187948157
Interferometer unlocked!
Re-locking in progress
---
System moved to DET lab
At Aug28,17-13:58:14 -> GPS: 1187956710
Increased air flux in DET
Only one monitor speaker
Two sub-woofer as before
Level of Monitor speaker: 3/4 range
Level of Sub-woofer amplifier: FULL range
Up to Aug28,17-14:04:49 -> GPS: 1187957105
Useful as "quiet time" but with increased air flux
Noise level 0.0001
Aug28,17-14:54:43 -> GPS: 1187960099
Aug28,17-15:11:56 -> GPS: 1187961132
Noise level 0.0003
Aug28,17-15:12:33 -> GPS: 1187961169
noise increase in ENV_EDB_MIC
Feeble increase in ENV_CEB_MIC
Nothing in other mics
Unlocked at Aug28,17-15:20:20 -> GPS: 1187961636
Noise level 0.001
Aug28,17-15:51:26 -> GPS: 1187963502
High noise in ENV_EDB_MIC
Visible effect in ENV_CEB_MIC also
Nothing in other mics
Aug28,17-15:57:10 -> GPS: 1187963846
Back to Noise level 0.0003
Aug28,17-15:59:33 -> GPS: 1187963989
Aug28,17-16:05:02 -> GPS: 1187964318
Back to Noise Level 0.0001
Aug28,17-16:08:30 -> GPS: 1187964526
Effect visible in ENV_EDB_MIC only
Aug28,17-16:18:31 -> GPS: 1187965127
Quiet time
Aug28,17-16:19:47 -> GPS: 1187965203
Aug28,17-16:33:23 -> GPS: 1187966019
At about Aug28,17-16:52:01 -> GPS: 1187967137
Decreased air flux in DET
---
Today we performed another set of Acoustic Injections, here following is the time-table.
As a general remark, we suggest having a look inside time periods of each injection because the interferometer had some glitches (probably not correlated to injections).
It seems WEB was more sensitive to high acoustic levels respect to NEB (to be investigated a posteriori)
---
Morning: System moved to NEB
Two monitor speaker
Two sub-woofer
Level of Monitor speaker: 3/4 range
Level of Sub-woofer amplifier: FULL range
Noise is band-passed 10Hz --> 2kHz
Time is Local time
Quiet time
Aug30,17-09:49:25 -> GPS: 1188114581
Aug30,17-10:01:48 -> GPS: 1188115324
Noise level 0.0001
Aug30,17-10:48:06 -> GPS: 1188118102
Aug30,17-10:58:09 -> GPS: 1188118705
Noise level 0.0003
Aug30,17-10:59:01 -> GPS: 1188118757
Aug30,17-11:09:01 -> GPS: 1188119357
Noise level 0.001
Aug30,17-11:09:51 -> GPS: 1188119407
Aug30,17-11:15:57 -> GPS: 1188119773
Noise level 0.003
Aug30,17-11:16:46 -> GPS: 1188119822
Aug30,17-11:21:39 -> GPS: 1188120115
Noise level 0.006
Aug30,17-11:22:41 -> GPS: 1188120177
General noise increase (10 to 100 times) in ENV_NEB_MIC
No visible effect (by eye) in DF
Aug30,17-11:32:30 -> GPS: 1188120766
NEB AI ended at Aug30,17-11:33:25 -> GPS: 1188120821
---
Afternoon: System moved to WEB
Same conditions as before
Quiet time
Aug30,17-12:22:00 -> GPS:
Aug30,17-12:31:31 -> GPS: 1188124307
Noise level 0.0001
Aug30,17-12:36:56 -> GPS: 1188124632
Aug30,17-13:07:39 -> GPS: 1188126475
Noise level 0.0003
Aug30,17-13:09:25 -> GPS: 1188126581
Aug30,17-13:21:58 -> GPS: 1188127334
Noise level 0.001
Aug30,17-13:23:03 -> GPS: 1188127399
Aug30,17-13:33:13 -> GPS: 1188128009
Noise level 0.003
Aug30,17-13:34:37 -> GPS: 1188128093
Aug30,17-13:44:51 -> GPS: 1188128707
Noise level 0.006
Aug30,17-14:01:27 -> GPS: 1188129703
Visible drop of the horizon, B1p moving a lot in the camera, B7_DC and B8_DC very noisy (mainly in the Very Low frequency, say below 10Hz) – probably is an alignment sensitivity to AI ?
Aug30,17-14:04:08 -> GPS: 1188129864
Noise level back to 0.003
Aug30,17-14:08:11 -> GPS: 1188130107
Aug30,17-14:11:47 -> GPS: 1188130323
Quiet time
Aug30,17-14:13:06 -> GPS: 1188130402
Aug30,17-14:16:41 -> GPS: 1188130617
WEB AI ended at Aug30,17-14:16:41 -> GPS: 1188130617
I publish here some plots showing results of acoustic injections done in CEB on August 28. These are just spectra, since projections are still pending 
...
Figures 1,2 and 3 are from loudspekers in the hall, above DET terrace
Figures 4,5 and 6 are with loudspekers inside DET Lab.
Qualitatively we see that below 200 Hz we set an upper limit which is a factor 10 below Hrec, while the region around 250Hz is indeed sensitive to acoustic noise in the hall and region 400-450Hz is sensitive to DET LAB.
The helicopter noise of 39684 is below 150Hz, but roughly it looks more than a factor 10 above quiet condition. Thus the observed coupling noise in Hrec seems not unconsistent with acoustic injection results.
A projection will be done to better study this case.
