Please post your messages related to electro-acoustical measurements
Subject Features Date
Tue Oct 1 2002 11:02
Author Lars Morset
(morset@winmls.com)
Bob, thanks for your questions.
1) In-phase part 2) Quadrature part
[Lars Morset] The new beta can plot the real and imaginary part.
I want to be able to put a “time window” around the direct sound so I can remove any reflections. Does the width of the time window affect the speed of the measurement like the present implimentation of TDF (TEF20) does?
[Lars Morset] You can window the impulse response after the measurement as a post-processing. Please note that we are not using any kind of tracking window in WinMLS during the measurement. If you want the impulse response as result, I do not see the advantage with using a tracking window.
1) Amplitude vs. Frequency response 2) Phase vs. Frequency response 3) Impulse response
[Lars Morset] This you can do with WinMLS.
4) Doublet response (Hilbert transform of Impulse response)
[Lars Morset] WinMLS plots the Energy-Time-Curve, which I think is similar to.
Because some of the terms you use are new to me, I had to consult professor Peter Svensson about this. His answer is as follows: "I don't think that some of these quantities are relevant for an impulse response measurement system. When you calculate the transfer function as the FFT of the impulse response, you get the complex value of the transfer function. But this is probably not what you are asking for?"
If you have further comments or questions, please post them. If you want to direct questions to prof. Svensson, he said he was willing to answer them.
