2025/02/11 10:21:00 - 10:51:00(JST)
50 - 150 Hz 100 cnt, 1 Hz resolution 10 s in one frequency
Fig.1. showed the whitened spectrogram during the acoustic injection REFL.
Left : DARM, Right : microphone at PR booth
Microphone :
There are some wide frequency sound detected around the 12 minutes labelled in X arm
DARM :
We can see relatively wide frequency response for each frequency
in several frequencies, higher harmonics detected
Around the 25 min, we can see some excitation (maybe) independent from the acoustic injection, 170, 400 and 720 Hz excited (some violin mode excitation by something?)
After the 12 min, which was seen in strange behavior in microphone, several excitation can also seen in DARM,, harmonics of 60 Hz?
