Didn't get chance to reply earlier. About 12 years ago, I set up a system with 32 speakers on a hemisphere, 1st and 2nd order material with 8x subs, 1st order horizontal only , low pass 90 Hz
I excluded height for Lf simply because of the logistics of flying bins, but also as elevation cues are Hf. Given that "elevation" is not the same as "vertical" for listeners who tilt their heads ( in a complex 3-d sound field, that seems to be most), nevertheless, the mid'n'tops (which actually went down to about 70Hz)carried sufficient 'authority' (32 of 'em, remember) that it didn't seem any problem - though no formal psychophysical testing, of course. Over a relatively large listening area, (12m, I think) . For mobile listeners, and indeed, off-centre listeners, the amplitude gradient at Lf was readily discernible, so that kind of cue, though not normally part of Duplex theory for directional hearing, seemed relevant to the experience. Cheers ppl Dr. Peter Lennox School of Technology, Faculty of Arts, Design and Technology University of Derby, UK e: p.len...@derby.ac.uk t: 01332 593155 -----Original Message----- From: sursound-boun...@music.vt.edu [mailto:sursound-boun...@music.vt.edu] On Behalf Of Eric Carmichel Sent: 20 February 2013 20:21 To: sursound@music.vt.edu Subject: [Sursound] Bi-Amping the B-format Greetings to All: I am building a surround system for the playback of live recordings and video. Naturally, as with all of us, there are economic as well as technical constraints. The purpose of this post is suggest (and receive feedback) for a system that uses multiple subwoofers in order to obtain the directional components of very low frequency sounds. One could justifiably argue that we don’t have a keen sense of direction for the low lows (and why subwoofers can be placed in inconspicuous places), but that is not the issue at hand. In fact, I’ve always been a proponent of center-channel subs since my introduction to hi-fi decades ago. Today my low end needs direction to accurately recreate industrial sounds. .... _____________________________________________________________________ The University of Derby has a published policy regarding email and reserves the right to monitor email traffic. If you believe this email was sent to you in error, please notify the sender and delete this email. Please direct any concerns to info...@derby.ac.uk. _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
