10:48 LT switched on spekers (they emitt some 50Hz + harmonics related noise

colored 1000 1980, 1e-5
1269253116  26 Mar 2020 10:18:18 UTC  (26 Mar 2020 11:18:18 CET)
1e-4
1269253178  26 Mar 2020 10:19:20 UTC  (26 Mar 2020 11:19:20 CET)
little something in CEB mic, only
5e-4
1269253270  26 Mar 2020 10:20:52 UTC  (26 Mar 2020 11:20:52 CET)
see well in microphones: CEB all x5 above 100 tille 3kHz
see something 420, ... DET stuff
1e-3
1269253647  26 Mar 2020 10:27:09 UTC  (26 Mar 2020 11:27:09 CET)
grows bump around 160Hz

%%% slices

colored 60 120 1e-3
1269254110  26 Mar 2020 10:34:52 UTC  (26 Mar 2020 11:34:52 CET)
extra sound only from 60 to 100

colored 25 50 5e-3
1269254466  26 Mar 2020 10:40:48 UTC  (26 Mar 2020 11:40:48 CET)
grows bump 40-60 

colored 150 100 2e-3
1269255020  26 Mar 2020 10:50:02 UTC  (26 Mar 2020 11:50:02 CET)
grows bump 160Hz


colored 250 100 2e-3
1269255500  26 Mar 2020 10:58:02 UTC  (26 Mar 2020 11:58:02 CET)
excited structured around 290, 340 and typical DET structures....

two lines 180 180.01, volume 0.1
1269256202  26 Mar 2020 11:09:44 UTC  (26 Mar 2020 12:09:44 CET)
Hrec 180Hz line and bumps around it(?) is large (x10) and seems to breath following sound beatings

reduced volume to 0.01
1269256847  26 Mar 2020 11:20:29 UTC  (26 Mar 2020 12:20:29 CET)

10 lines 11, 21, 31, 41, 41, 51, 61, 71, 81, 91, 101
volume 1e-3
1269257543  26 Mar 2020 11:32:05 UTC  (26 Mar 2020 12:32:05 CET)
only 81Hz in microphone

various adjustments to equalize lines in microphone
1269257988  26 Mar 2020 11:39:30 UTC  (26 Mar 2020 12:39:30 CET)
in mics we create intermodulations (1Hz combs)
in Hrec we see some effect at 21Hz and 42Hz ...
OFF
1269258546  26 Mar 2020 11:48:48 UTC  (26 Mar 2020 12:48:48 CET)

approx 11:59 a few tappings on SR flange SOUTH

approx 12:01 a few tappings on DT flange SOUTH 

12:06 back in SCIENCE