Hi Fons, I’m not sure if I understand your question correctly. I’ll do my best to be comprehensive so that my response covers what you are interested in:
For this type of array, the spatial aliasing frequency f_a is dependent on order N and radius R of the array in the exact same manner like with spherical microphone arrays (SMAs): N = (2 pi f_a / c) R N = 7 R = 0.0875 m So that f_a = 4.3 kHz The lower end is limited by the radial filter gain that the user chooses. The radial filters are not the same like with SMAs, but they are very similar so that the limitations are the same. 0th and 1st order are available for all frequencies. 2nd order approx. above 200 Hz 3rd order approx. above 500 Hz etc. I cannot comment on calibration requirements because we did calibrate the array… (Nor did we measure how well it was calibrated out-of-the-box.). I don’t actually think that there are any special requirements. As before, much of the physical limitations are qualitatively (and also quantitively) similar to SMAs. Best regards, Jens > On 1 Dec 2021, at 12:36, Fons Adriaensen <f...@linuxaudio.org> wrote: > > On Wed, Dec 01, 2021 at 09:03:59AM +0000, Jens Ahrens wrote: > >> Their main advantage over conventional spherical microphone arraysi >> is the fact that they require only 2N+1 microphones for Nth spherical >> harmonic order > > For the microphone in the video, what is the usable frequency range > for each order, taking into account required gain and calibration > accuracy (for LF) and aliasing (for HF) ? > > Ciao, > > -- > FA > > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit > account or options, view archives and so on. _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
