This morning we injected broadband acoustic noise at WEB with the prepared setup. We managed to excite some structures and lines, some of which exist in the Quiet Hrec: Figure 1 (high resolution FFT), Figure 2 (spectrogram)
- 41.3 Hz
- 48.0 Hz ... and sometiing else closeby? (Figure 3.)
- 70.3, Figure 4.
- bump around 106Hz (not in quiet Hrec), Figure 5.
Attached is log file with all details of injection times. A good time for analysis is 8 minutes starting at 12:22 UTC.
Interesting to check SWEB signals. Also, interesting to do the same at NEB.