Like I said - go away and all sorts of interesting stuff comes up..... On 11 June 2013 23:02, Fons Adriaensen <f...@linuxaudio.org> wrote:
> Part of the problem may be that even while the Eigenmic capsules are of > very high quality, the remaining random differences in sensitivity > and frequency response are still too large to allow accurate higher > order processing without individual calibration. I have wondered if, at least post recording, something could be done by looking at the end of the reverb tail which, at least in some environments, would be pretty well directionally homogeneous. Differences between capsule outputs should then be due to sensitivity/frequency response rather than direction. > And until someone > finds a better method than renting an anechoic room for half a day, > such calibration is an expensive exercise. > > There is a method that can be used if you have an open area, no wind, and a nice warm dry climate and that's to sit your speaker in a hole in the ground pointing up and mount the mike two or three meters above. Do it properly and its essentially in a reflection free environment. Vastly cheaper than an anechoic room but, of course, totally at the mercy of the weather, so not good for a production environment though one of the mic manufacturers did use it for a while - can't remember which one but it was in an AES paper a good few years ago - which is where I got the idea. Dave -- As of 1st October 2012, I have retired from the University, so this disclaimer is redundant.... These are my own views and may or may not be shared by my employer Dave Malham Ex-Music Research Centre Department of Music The University of York Heslington York YO10 5DD UK 'Ambisonics - Component Imaging for Audio' -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20130619/5b97ecd7/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
