I have just computed the absorption coefficients for the drop impacts, instead of a pulse generation.

To do this, I imported the raw drop data into Matlab and manually set all of the areas that had any bubble noise to zero.  Then I went back to my software and averaged the pulses like before.  Back in matlab I filtered the average (because there was a VLF frequency that would mess up the power measurements) and calculated the mean power.

The results gave an average absorption coefficient of 0.49.  A slightly better, but similar result that from yesterday.  This helps to conclude the anechoic nature of the lining.

Phil