Recent content by Antoine B

Hi, I believed more the Impulse Response lasts 2 ms... I've never seen such a stand The tube is aimed to increase the directivity of the microphone ?

Thank you, I'll try it next time So there isn't such a difference in sound during a regular use ?

Hello, I am doing some tests on loudspeaker having a bluetooth and a RCA entry. I use the USB wired UMIK-1 to record. I was really surprised to see the differences in IR for 2 sweep measurments, one driven by RCA wires (and soundcard of the PC) and the second driven by bluetooth : (RCA)...

Hey, I did another time the same experiment, but I used a different setup because the big stool wasn't available. The height was slightly smaller (1,5m instead of 1,75) Here is a picture : It isn't easy to see here but the distances with walls and objects are much greater than 2m. This...

Yes obviously, I am working on understanding also with academic researcher Then I don't get what parameter differs from my setup and yours, else than window length and smoothing. Mayve REW version.

Got it, I obtain a similar graph with IR window 500ms and 1/48 smoothing. Even if the medium frequency peaks aren't exactly the same (is there something non deterministic in the used algorithm ?) But if I want I can use a more powerfull smoothing and obtain a very clean Group Delay, it...

Hello, thank you a lot for your help. I am thinking that, after all, these curves are a good anechoïc approximation as I wanted. I was probably disturbed by no clear reflection pattern. I was expecting a reflection occuring at approximately 7ms but the intensity is lowered by the distance...

Thank you for your reply ! I should have deleted the 4th measurement in my file, it was just to verify there was no bug in REW (I switched off the loudspeaker). I was expecting a curve like this : Because I tried to follow the guide "How to make quasi-anechoic speaker measurements". I think...

Here are they

Hello, I wanted to follow the guide “How to make quasi-anechoic speaker measurements / spinoramas with REW and VituixCAD” to make measurements of loudspeakers in a hangar. Here is my installation: I use the UMIK recommended with REW, with standard calibration files found on internet (I took...

Yeah I think I wasn't clear enough due to english issues, but I said I will first look at the sources and come back if I still don't have something

I will look at the sources, however if I already see the big picture, I would like to know the detail, which mathematical function is used to generate the sweep and how the signal is combined with source to get frequency response. I suppose it is a simple division in frequential domain but the...

These ones : Guy-Bart Stan, Jean-Jacques Embrechts, Dominique Archambeau, "Comparison of different impulse response measurement techniques", JAES Volume 50, Issue 4, pp. 249-262, April 2002. Swen Müller, Paulo Massarani, "Transfer-Function Measurement with Sweeps", JAES Volume 49 Issue 6 pp...

Can you please link me a more detailed paper than the one cited in the help ?

As a recent REW user, I am disappointed by the absence of a formalisation of the procedure. In the help, it is described pedagogically but without using mathematical terms. A paper is cited, I red it and didn't find more than a block chain explaining the main steps of the process. I could write...