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Post by novisnick on Nov 30, 2015 21:54:55 GMT -5
At what point does sound become directional? Bass is said to be non directional, so at what frequency can I / should I be able to distinguish where a sounds/frequencies are coming from? Please don't poke fun at me, I just dont know the answer. Is there one? Thanks all.  Also, someone a year ago or so posted a chart of frequency to sound diagram, i hope that makes sense. |
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Post by geebo on Nov 30, 2015 22:29:47 GMT -5
80Hz is generally accepted as the point above which sound becomes directional although some would dispute that number.
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Post by vcautokid on Nov 30, 2015 22:31:58 GMT -5
I wouldn't, I like that number George.
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Post by MusicHead on Nov 30, 2015 23:18:05 GMT -5
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Post by lionear on Dec 1, 2015 0:36:38 GMT -5
en.wikipedia.org/wiki/Room_acousticsSound would be "non-directional" at the frequencies below and up to the pressure zone. This depends on the maximum dimension of the room. At sea level, half the wavelength of a 20 Hz sound wave comes to about 27 ft. So if your room has at least one dimension that's greater than 27 ft, the room would be capable of playing a 20 Hz sound wave - directionally. But whether or not we'd hear it will no doubt depend on our sound system, the room acoustics and our hearing.
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Post by Jean Genie on Dec 1, 2015 1:56:03 GMT -5
At what point does sound become directional? Bass is said to be non directional, so at what frequency can I / should I be able to distinguish where a sounds/frequencies are coming from? Please don't poke fun at me, I just dont know the answer. Is there one? Thanks all. Also, someone a year ago or so posted a chart of frequency to sound diagram, i hope that makes sense. Here ya go, Nick. I hope this is what you're referring to: www.independentrecording.net/irn/resources/freqchart/main_display.htmMight give you an idea to what instrument(s) to listen . |
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Post by AudioHTIT on Dec 1, 2015 2:17:42 GMT -5
At what point does sound become directional? It's not really sound that becomes directional, it's our ability to tell where it's coming from. If our heads and ears were a different size or shape, then the frequency at which we can detect directionality would change, just as it would be different for various animals. Just clarifying that it's not the sound, it's our perception. |
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Post by yves on Dec 1, 2015 4:37:51 GMT -5
80 Hz is considered to be the absolute limit, but if the crossover of your sub is set to 80 Hz then your sub will still output sound energy above 80 Hz due to the crossover slope, as the crossover point is at -6 dB. An example:  Other things to consider are that (1) sound waves interact with eachother in a room and that (2) adding one or more subs to match with existing speakers (as opposed to getting a HTIB / speaker package that has the matched sub already included in it) essentially boils down to redesigning speakers... i.e., it's a complex matter. So, even if your sub isn't outputting much if anything above 80 Hz, you can't just assume that it will have no audible effect on the stereo image / three-dimensionality of the sound, and, as such, too much focusing your attention on the non directionality of sounds below 80 Hz is a bad idea. |
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Post by Deleted on Dec 1, 2015 7:46:47 GMT -5
it also depends on location of subs in the room
if they are setup equidistant to the MLP but in different locations...the xover can be much higher before localization can be heard...also if a single sub is nearfield, even at 80 hz it may be easily located..
I currently run all speakers at 100hz xover with 3 subs all varying distances...and I cannot localize where the bass comes from
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