What B stand for?

[Flowsurfer]

Hi James, I recorded my wim Hof breathing session follow by meditation/rest. There are several B on the chart during my breathing. What do they mean? Also during the meditation that follow the breathing session waves dropped negative values, compared during the active breathing session. What this mean?

[James]

Hold your Mouse over the letters and it will show you

"negative" numbers are still just numbers, there's nothing significant about the fact that they're negative.

I think the B's are blinks, but they should be filtered out from the display. Can you please email me your recording so I can test?