Please post your messages related to electro-acoustical measurements
Subject Be aware of time variance Date
Sat Sep 21 2002 08:46
Author Lars Morset
(morset@winmls.com)
Dear Bob, thanks for your question.
Is the desired result polar plot at specific frequencies (not in octave bands)?
If you are interested in obtaining the impulse response (from which you can calculate polar plots, frequency response and so on) I would recommend the new logarithmic swept sine available in the new WinMLS beta version. This method is better than MLS for long distance measurements (because of the robustness to time-variance due to wind and temperature gradients).
WinMLS is optimized to get the best SNR for the chosen measurement method for such type of measurements. I would find it strange if any system would give a better SNR for a MLS or log swept sine excitation.
I would recommend a high quality sound card to get the best results.
