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In Reply to: RE: How do omnidirectional speakers compare to surround sound? posted by jimbill on November 23, 2020 at 14:49:49
MBL speakers may radiate in 360 degrees, but do all instruments really do the same? Horned instruments fire towards the audience, no? Stringed instruments can fire upwards and/or forward, no? Sure their sounds travel in all directions, but towards the audience seems where most of the energy would be directed. Then there's your amplified instruments, with their speakers always firing forward. Having a speaker radiate sound equally in all directions doesn't seem to make sense. I've never heard a pair though and they may very well sound excellent and more realistic. Could it be that omni-directional speakers favor unamplified music more so than say, a rock concert? Interested to hear others thoughts on this.
marc g. - audiophile by day, music lover by night
Edits: 11/24/20Follow Ups:
...who chimed in with those, to me, educational insights. And my apologies to the OP whose thread I didn't mean to hijack!
marc g. - audiophile by day, music lover by night
You must still remember to not confuse the shape of an instrument with dispersion. You must include the frequency it is producing. The longer the wave length the wider the dispersion no matter the producer shape(true for speakers too). Very low frequencies are omni and the source can't even be located(it's the higher harmonics that let you locate it). And very high frequencies are verydirectional. In between it's a transition.
> Horned instruments fire towards the audience, no?
the metal walls also oscillate and radiate significant sound.
French horns do not.
tuba! lituus? sarrusophone?
saxophone / saxtromba / saxtuba? well, there's other woodwinds too ... basoon! bass and contra bass clarinet ... and ... uh
actually, that's all I got
regards,
when their keyholes are open (as is the case for most notes) there will be significant sound emitted there, and not on the bell. In fact that's why for a clarinet, for instance, the notes with holes open up to the higher part of the instrument (and there are 2 ranges depending on the 12th key being used or not) project further and have higher frequency harmonics audible.
'higher frequency harmonics audible'
that's all I've ever been able to get trying to play reeds Dr.!
just terrible! babies cried, dogs barked, a cacophonous non-melodious din
of course, I was the guy that went through a two year supply of valve oil in three weeks with it drooling out of the bell when trying to play coronet for band ... eventually switched to guitar because the folks were wise enough to deny me the drum set I lusted after ... a very wise move
regards,
I'll tell you though Kal, I find the metaphor of 'firing' instruments to be vaguely disturbing unless it's used with a military marching band
oh! my poor sensitivities!
regards,
'Could it be that omni-directional speakers favor unamplified music'
in my experience yes they do to an extent ... except
in electrified instruments there's different types of speaker cabinets used and some of them are 'open back' cabs ... while a drum kit's output radius is very omnidirectional in nature ... front, back, up-down, while the vocalist is usually miked through closed back cabinets to project towards listeners ... yet since those wave forms are amplified there's stronger reflected sound involved ... you can probably tell where I'm going with this ...
so an omni or OB speaker system can and often does better reproduce a more natural ambient listening experience, and of course the better engineered they are the better that experience is
your mileage probably won't vary!
be well,
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