Those are just numbers I typed but the calculation is something along the line of ...
Imagine Column A is a filled with the measurement number (e.g. 1, 2, 3, 4, 5, 6, 7 etc.), with column B containing the numbers used to calculate the equivalent number, the calculation is something like for the first 3 values:
Code:
A B C
1
2 84.9
3 57
4 30 80.1
Code:
x = (10 * log((1/(A4 - A1)) * (10^(B2/10)+10^(C2/10)+10^(D2/10))))
X = 80.1
For 6 rows it will be:
Code:
x = (10 * log((1/(A7 - A1)) * (10^(B2/10)+10^(C2/10)+10^(D2/10)+10^(DE/10)+10^(F2/10)+10^(G2/10))))