%% channels
ENV_DET_MIC = external microphone, B&K 4193 (infrasound)
ENV_ESQB1_MIC = internal microphone on ESQZB1, B&K 4190 (regular)

air conditioning in DET lab is always on, in FULL power mode 

"flux" = laminar air flux on inside ESQZB1 area (both fan-group)
"no flux" = laminar flux off

tested various combinations:
internal microphone positons: I1,I2,I3,I4
external microphone positions: E1,E2,E3,E4,E5

%%% Huddle of two microphones
1298627514  01 Mar 2021 09:51:36 UTC  (01 Mar 2021 10:51:36 CET)
2 mins

positions E1, I1
no flux
1298628845  01 Mar 2021 10:13:47 UTC  (01 Mar 2021 11:13:47 CET)
1298629030  01 Mar 2021 10:16:52 UTC  (01 Mar 2021 11:16:52 CET)
flux
1298629132  01 Mar 2021 10:18:34 UTC  (01 Mar 2021 11:18:34 CET)
1298629253  01 Mar 2021 10:20:35 UTC  (01 Mar 2021 11:20:35 CET)

pos E2, I1
flux
1298629324  01 Mar 2021 10:21:46 UTC  (01 Mar 2021 11:21:46 CET)
1298629445  01 Mar 2021 10:23:47 UTC  (01 Mar 2021 11:23:47 CET)
no flux
1298629595  01 Mar 2021 10:26:17 UTC  (01 Mar 2021 11:26:17 CET)
1298629713  01 Mar 2021 10:28:15 UTC  (01 Mar 2021 11:28:15 CET)

pos E3, I1
no flux
1298630006  01 Mar 2021 10:33:08 UTC  (01 Mar 2021 11:33:08 CET)
1298630127  01 Mar 2021 10:35:09 UTC  (01 Mar 2021 11:35:09 CET)
flux
1298630149  01 Mar 2021 10:35:31 UTC  (01 Mar 2021 11:35:31 CET)
1298630269  01 Mar 2021 10:37:31 UTC  (01 Mar 2021 11:37:31 CET)

pos E4, I1
flux
1298630562  01 Mar 2021 10:42:24 UTC  (01 Mar 2021 11:42:24 CET)
1298630679  01 Mar 2021 10:44:21 UTC  (01 Mar 2021 11:44:21 CET)
no flux
1298630709  01 Mar 2021 10:44:51 UTC  (01 Mar 2021 11:44:51 CET)
1298630832  01 Mar 2021 10:46:54 UTC  (01 Mar 2021 11:46:54 CET)

pos E1, I2
no flux
1298631139  01 Mar 2021 10:52:01 UTC  (01 Mar 2021 11:52:01 CET)
1298631288  01 Mar 2021 10:54:30 UTC  (01 Mar 2021 11:54:30 CET)
flux
1298631298  01 Mar 2021 10:54:40 UTC  (01 Mar 2021 11:54:40 CET)
1298631439  01 Mar 2021 10:57:01 UTC  (01 Mar 2021 11:57:01 CET)

pos E1, I3
flux
1298631813  01 Mar 2021 11:03:15 UTC  (01 Mar 2021 12:03:15 CET)
1298631939  01 Mar 2021 11:05:21 UTC  (01 Mar 2021 12:05:21 CET)
no flux
1298631955  01 Mar 2021 11:05:37 UTC  (01 Mar 2021 12:05:37 CET)
1298632077  01 Mar 2021 11:07:39 UTC  (01 Mar 2021 12:07:39 CET)

pos E1, I4
flux
1298632455  01 Mar 2021 11:13:57 UTC  (01 Mar 2021 12:13:57 CET)
1298632579  01 Mar 2021 11:16:01 UTC  (01 Mar 2021 12:16:01 CET)
no flux
1298632595  01 Mar 2021 11:16:17 UTC  (01 Mar 2021 12:16:17 CET)
1298632718  01 Mar 2021 11:18:20 UTC  (01 Mar 2021 12:18:20 CET)

pos E5, I4
no flux
1298632831  01 Mar 2021 11:20:13 UTC  (01 Mar 2021 12:20:13 CET)
1298632951  01 Mar 2021 11:22:13 UTC  (01 Mar 2021 12:22:13 CET)
flux
1298632979  01 Mar 2021 11:22:41 UTC  (01 Mar 2021 12:22:41 CET)
1298633107  01 Mar 2021 11:24:49 UTC  (01 Mar 2021 12:24:49 CET)