sursound-requ...@music.vt.edu<mailto:sursound-requ...@music.vt.edu> kirjoitti 21.1.2014 kello 19.00:
thanks for elaborating! very interesting method and survey! one thing i'm asking myself: since you can only ever have one direction per time window, does that mean that each direction estimate will "trigger" a complete IR decay trail from the omni mic in that direction? i.e. your directional resolution is really high, at the cost of identical timbre of all reflections? are there any perceptual drawbacks? i'm sure i wouldn't notice, unless the carpet i'm standing on is knee-deep, but... :) particularly, will the "seat dip" effect be averaged and spread into all directions? One time window gives one direction estimate as it is an impulse response which is analyzed. In ideal impulse everything (all frequencies from one direction) are in one sample. In practise impulses are spread in time, but the idea still works well. Thus, after the directional analysis all samples of one omni IR is distributed to reproduction loudspeakers. This results that in reproduction loudspeakers the convolution reverbs are quite sparse. However, after convolution with anechoic signal the perceived spatial sound is very natural without any coloration. I hope this clarifies and answer to your question. We have not found any perceptual drawbacks. Naturally, the quality of IR is important, the used loudspeaker should reproduce short impulse, e.g., a dodec usually used in room acoustical measurements is not very good as it emits several impulses from all elements. And as far as I understand the "seat-dip effect" is correctly reproduced, but I do not have any data to prove it. At least it sounds the same as in-situ in real halls. Tapio -- Tapio Lokki <tapio.lo...@aalto.fi<mailto:tapio.lo...@aalto.fi>>, https://mediatech.aalto.fi/~ktlokki/ Aalto University School of Science, Department of Media Technology PO Box 15500, FI-00076 Aalto, Finland, tel. +358-40-578 2486, fax +358-9-4702 5014 -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20140122/2bd4bc69/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
