How to calculate multiplication of two discrete series

1. How do you multiply two signals practically?

How do you multiply two signals practically?

The relation is shown by the following formula ln (a»b) =ln a+ ln b. This formula shows that two signal voltages are effectively multiplied if the logarithms of the signal voltages are added. 2.By Summing the outputs of the two log amplifiers, you get the logarithm of the product of the two original input signals.