Hi Aaron - which is exactly what Ill be doing over the next few weeks ! Ill be using a program called Holm Impusle - We've already measured the frequency response of the capsules individually - next we are going to measure the finished array with the capsules in sitiu. We have filled the space in between the capsules to try and reduce reonance/reflections. We may also attempt to callibrate the "timing "of each capsule in the same way we have with the gain as well as trying to offset the tiny time of arrival difference caused by the fact we are using two capsules to create a figure of 8 rather than one ribbon mic - the initial test show the frequency response is pretty similar between the capsules though there was a greater degree of variance with the gains (the gains differences are compensated for in the software already) , as you say once in the chasis the reflections and resonance of the casing may change that. Ill post results when they're done. Initial results with the microphone are pretty good actually - but theres lots of tweaking to be done....
cheers, Gus On 29 May 2012 04:57, Aaron Heller <hel...@ai.sri.com> wrote: > I've simulated the diffuse field response for the Velan design using > the A-to-B matrix I gave earlier. The analysis and graph are at > > http://www.ai.sri.com/ajh/ambisonics/velan_sim_dfr.html > > Note that in practice these simulations are only a starting point for > EQ. Real capsules deviate significantly from the idealized math > models used here. In addition, the capsules shadow each other and the > space in the middle acts as a resonant cavity. So you really have to > measure the finished array and then design the EQ. > > -- > Aaron Heller (hel...@ai.sri.com) > Menlo Park, CA US > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20120529/3df84446/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
