Time to repeat my old suggestion that, on the RBOOM side, you could divide all the data values by 10 (or 8 if more convenient) without losing anything. This is because of the amount of instrument noise in the signal. See this posting for the noise with the air “short-circuited”.
The no-signal reading is +/- 1000 counts and this is faithfully recorded by the lossless compression scheme that Raspberry uses. A lossless compression scheme achieves zero compression on a signal that is all noise.
I note that originally it was thought that the gain of the instrument was 4000 counts per pascal. It turned out to be 56000 counts/pascals. Maybe that is why there is 10 dB too much gain/noise in the signal.
The problem would be how to handle the change in the instrument response …