SQL50 Posted October 27, 2014 Report Share Posted October 27, 2014 I'm looking for an accurate box designing software. Out of the two that I have used so far, winisd & torres, the numbers are always off from each other. I don't know which one is correct, or if both are incorrect. If software isn't the answer, what are the formulas to calculate vent length etc? The only thing I've ever went off of was the software, but it'd be nice to be able to make a box using nothing but pencil, paper, and a calculator that way you know it's correct. Link to comment Share on other sites More sharing options...
SQL50 Posted October 27, 2014 Author Report Share Posted October 27, 2014 I'll add this with what I posted. It'll simplify my question. How do you know that your enclosure is tuned at 28hz, 32hz, 35hz etc? How exactly are you figuring that out? What's the formula to knowing that x amount of vent length is giving you a certain tuning at x hz? & if you used software to design it, what's the math you need to do to double check the softwares accuracy? Pretty much the same question asked in a different way. Link to comment Share on other sites More sharing options...
Krakin Posted October 27, 2014 Report Share Posted October 27, 2014 Both programs get you pretty close for an anechoic environment (absolutely no reflected sound), WinISD allows for some port end-correction. They are just a pretty large learning curve. For some formulas you can use these. http://www.wolframalpha.com/input/?i=helmholtz+resonator http://www.carstereo.com/help/Articles.cfm?id=21 There was another somewhere that I can't remember the name of the site. Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
Krakin Posted October 27, 2014 Report Share Posted October 27, 2014 Found it. http://www.diysubwoofers.org/misc/portcal.htm Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
SQL50 Posted October 27, 2014 Author Report Share Posted October 27, 2014 Thanks, I still have a TI-84 Plus from high school. So I should be set. Link to comment Share on other sites More sharing options...
SQL50 Posted October 27, 2014 Author Report Share Posted October 27, 2014 Unfortunately that was 4 years ago, I wish I would of learned this stuff then and maybe I wouldn't be such a dumbass now. Link to comment Share on other sites More sharing options...
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