Dear Filippo, Thanks a lot for your quite valuable comments.
> Apparently, as Akis and Joern mentioned, the following items often are used > to > achieve externalization: > - decorrelation/reverberation > - head tracking > - individualized HRTF > - headphone equalization > What I am now confusing is what you mean by "decorrelation/reverberation"? How to do decorrelation? for What? Thank you so much in advance. Cheers, Junfeng > > We believe that the order of the items above reflects their relevance (in > decreasing order). > > At the London AES, I discussed this with some researchers from Aalto Uni > (they gave me an extremely impressive demo when I visited their lab in > Helsinki). They stressed the fact that a visual reference to the virtual > sound > source location is an extremely important localization cue... > > I should mention that interpolation of HRTF is not the only possible > technique; you can use for example a virtual loudspeaker array... > > Does the Dolby product implement head tracking? > > Hope this helps > Filippo > > >From: Archontis Politis <deadflagb...@gmail.com> > >Subject: Re: [Sursound] Sound Externalization Headphone > >To: sursound@music.vt.edu > >Message-ID: <4ddbca43.20...@gmail.com> > >Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > > >Hi, > > > >I would add to J?rn's comments that apart from head-tracking, which is > >crucial, you probably have to apply some decorrelation to your synthetic > >binaural signals, and mix them with the normal ones. From anechoic hrtfs > >only, especially if they are generic ones it is easy to get the in-head > >effect. You can add decorrelation by some room simulation algorithm, > >artificial reverberation or simpler by convolving your signals with > >bursts of noise, passing them through allpass filters, applying varying > >delays, whatever you can do that will scramble the phase but not the > >magnitude of the sounds. > > > >I have heard demonstrations with room simulated binaural responses that > >were well externalised without head-tracking, adding head-tracking > >should be very effective. You can check the literature for audio > >decorrelation techniques or artificial reverberation. Have a look also > >on the following master thesis: > > > >Headphone Sound Externalization - TKK Acoustics > >www.acoustics.hut.fi/publications/files/theses/liitola_mst.pdf > > > >Regards, > >Archontis > > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20110526/4ceb4ae6/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
