opaqueice;231083 Wrote: > Then you're using the term differently then everyone else. Don't just > believe me, look it up. > > > > Well, it's certainly true that room effects make this more complicated. > My point was merely that since dipole power falls off more repidly with > distance, that might be the reason dipole speakers are less sensitive to > the room.
Mmm. I think I know where opaqueice is coming from. The term monopole is assumed to mean firing in a beam, when in fact monopole radiation in general means going in every direction in phase (for those who doubt it, google "monopole" and "dipole" images). But when it comes to loudspeakers in particular..."monopole radiation" happens to occur with the traditional box-enclosure loudspeakers (see http://en.wikipedia.org/wiki/Loudspeaker). And these happen to have a pronounced forward directivity i.e. the side and rear radiation - although "monopole radiation" - is *very attenuated*. So the use of "monopole" to describe a loudspeaker firing in one direction is actually appropriate - although there is more to it than meets the eye. The dipole loudspeakers I know of have open baffles. They fire as much energy backwards as forwards, unlike closed-box speakers. So I would expect the room to provide more of the sound energy with open baffle speakers. I would expect their response to drop off slower than with closed-box speakers. As for room interactions with dipole speakers, I am not sure but here is my take on it. At the higher frequencies reflections are benign and even a positive feature of the dipole sound. At lower frequencies dipoles interact less with side walls anyway, because not much energy is radiated sideways, and front-to-back their radiation pattern creates a finer distribution of room modes. Darren -- darrenyeats SB3 / Inguz -> Sony DAS-703ES DAC -> Krell KAV-300i -> PMC AB-1 Dell laptop -> JVC UX-C30 mini system ------------------------------------------------------------------------ darrenyeats's Profile: http://forums.slimdevices.com/member.php?userid=10799 View this thread: http://forums.slimdevices.com/showthread.php?t=38593 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
