Hi Sean, My group’s first ambisonic dome was a 7m radius 4v icosa geodesic hemisphere in the late 1980s, and others subsequently:
Photos and descriptions etc here: http://www.avatar.com.au/wpsite/?page_id=41 and an ancient paper on the original project here: http://www.avatar.com.au/papers/Multichannel%20Performance.pdf There’s another two on the drawing board as we speak. We could skype about the technical issues if you’d like. Cheers, David --- Dr David Worrall Professor, Audio Arts and Acoustics Columbia College Chicago 33 E. Ida B. Wells Drive Room 601A Chicago, ILLINOIS, USA 60605 Wikipedia: David Worrall Personal research/creative practice website: avatar.com.au Some music/sonification: on soundcloud Youtube videos New Book: Sonification Design: From data to intelligible soundfields (Springer) From: Sursound <sursound-boun...@music.vt.edu> on behalf of Sean Devonport <rsdevonport1...@gmail.com> Reply-To: Surround Sound discussion group <sursound@music.vt.edu> Date: Wednesday, August 7, 2019 at 13:39 To: <sursound@music.vt.edu> Subject: [Sursound] The Acoustics of Domes Hey there everyone! Hope you're all well. I wanted to ask if anyone on the group has experience setting up a multichannel rig for a dome setup? Specifically designed to play Ambisonics. I've been working with a team looking to build a VR hemispherical dome that can display 360 video alongside Ambisonic content. The design for the dome structure is complete and now we're just figuring out the sound component. The sound is meant to fit seamlessly, and no obstruction should be on the floor. The dome is roughly 7m diameter, and built out of a fibre glass type material. We're planning to have a two layer type sound setup, so with roughly 14 speakers per layer plus a voice of god and a sub so (14-14-1.1). I was thinking that it could be an interesting idea to mount the sub in the ceiling above the VOG position, my reasoning being that the sub should emanate evenly across the floor of the dome, and it would prevent the need to have multiple subs outside the dome structure on the floor. I've never setup in a dome before and I can imagine the acoustics must be a little strange. Upon watching this video ( https://www.youtube.com/watch?v=JpdRYv9xA9w), I seem to get the feeling the task may get quite interesting. I'm hoping someone may have some experience with this. Some problems that I think may occur: 1. A boomy bass at floor level. 2. Room resonances and standing waves that don't seem to be very well studied. I think first port of call for the Ambisonic setup is to ensure that each speaker is calibrated to be the same loudness and time delay at the listening position. From there, I've been looking into applying an averaged DRC filter over the entire listening space to each loudspeaker to try get the most accurate speaker response for the listening area although I know this is quite a tricky challenge. I'm hoping that the DRC may help to mitigate some of the room resonances, however, I'd love to get a second (or more) opinion on how this would affect the setup. Anyone with any advice or resources on this would be very much appreciated! Thanks in advance. -- Sean Devonport -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20190807/9d90f940/attachment.html> _______________________________________________ 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. -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20190807/2eb84e98/attachment.html> _______________________________________________ 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.
