On Fri, Jan 07, 2011 at 11:10:41AM +0100, Jörn Nettingsmeier wrote: > for those non-ambiheads wishing to follow this discussion: > the near-field effect in ambisonics results in a bass boost. it's > caused by the speakers. ambisonic theory (without NFC) assumes plane > waves, i.e. speakers that are very far away, so that the wave fronts > are not curved. since they are curved in practice, you get the bass > boost. the same thing is responsible for the well-known proximity > effect on directional microphones. Not exactly. For a well-designed decoder the pressure at LF will be proportional to W, even without NFC, and should not have any bass boost. What you get in that case is a velocity field that does not match the pressure in level, and more important - in phase, and this sounds very unnatural. I'm pretty sure that uncompensated NF effects in reproduction systems are partly to blame for the 'you can't hear the direction of LF sources' myth. Ciao, -- FA There are three of them, and Alleline. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
