Hi
The MLS Method works as follows:
1) Create an MLS and pass it through the system you want to test
2) Calculate the cross correlation of the original MLS with the output of the system. Because of the way in which LabVIEW calculates the cross correlation, you can disregard the first half of the result (to do with the negative frequencies of an FFT).
3) You now have the impulse (time domain) response of your system under test (and its environment). You can identify the parts of the impulse response that you are interested in by looking at their position in time. For example, you can calculate how long unwanted room reflections will take to arrive at your microphone, find them in the impulse response, and then window the response so not to include those reflections (if your system response is shorter than the time taken for the reflections to arrive).
4) To find the frequency response of your system, FFT the impulse response of your system.
