Before you do RMS normalize, maybe remove everything below 30Hz and above 20kHz, if your project relates to human hearing. Generate will produce frequencies outwith that range which no-one can hear, but they will effect the result of RMS normalize if you don’t remove them.
30Hz-20kHz.XML (294 Bytes)
Even with the same RMS value, noise will not necessarily sound equally loud, e.g. …