Hi,
I am trying to figure out how to allow a user to add white noise to a signal, the idea is that the user would enter the noise ratio in db which I would then apply to a signal measurement before displaying it. I looked at the add gaussian white noise vis in LV but I am not sure how to go from the noise ratio that the user enters to the seed and standard deviation inputs for the function.
I tried to look online but all I found was ways to add noise based on amplitude, is there a way to convert from the db ratio to amplitude given that I do not know the amplitude information of my original signal before hand since it is being sampled in real-time. Any information about this would be greatly appriciated i realize that I might be mis-understanding the way signal/noise processing really works.
Thank you,
A