The overall RMS level of a power spectral density function is equal to the square root of the area under the curve.
Power spectral density specifications are typically given in log-log format. Thus special integration rules apply.
The Matlab scripts in psd_integ.zip calculate the overall level of a power spectral density function.
The main script is psd_integ.m.
The other scripts are supporting functions.
Tom Irvine
Email: tom@irvinemail.org