Cone area calculator

[Anniku989 10+ year member]

Had some visual basic homework, and decided to make a cone area calculator. Just starting this class in college, so I don't know much yet, but hopefully I'll get some more complicated things done.

Next is a impedence calculator, and sealed box calc.

http://rapidshare.com/files/148712308/Calculate_Cone_Area.exe.html

LMK if you guys want anything specific done, and I'll see what I can do

EDIT:

Sealed Enclosure Calculator

Not very advanced yet, but hopefully I'll get some tabs and such in it so you can figure out virtually any box

http://rapidshare.com/files/148892637/Sealed_Enclosure_Calc.exe.html

Just don't put in -12"-, leave everything strictly as numeric values with no inch/feet symbols

Click to read more...

 

[audioarsonal 10+ year member]

(pi)R^2 not to hard.

 

[Fiercetimbo17 10+ year member]

(pi)R^2 not to hard.

yes to any knowledgeable person, however this is CA.com...

 

[lil_italy773 10+ year member]

whatever u guys^^

still a nice little program thanks for yer efforts man.

 

[audioarsonal 10+ year member]

yes to any knowledgeable person, however this is CA.com...

I learned that in like 5th grade.//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[Anniku989 10+ year member]

(pi)R^2 not to hard.

You don't look around the forum very much do ya? //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[audioholic 5,000+ posts]

Everyone knows two 12's = 24"... what's so hard about that???

//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[Anniku989 10+ year member]

Everyone knows two 12's = 24"... what's so hard about that???
//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

Yeah, thats what I was getting at

12+12 > 18 ... dur! //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

 

[Anniku989 10+ year member]

Added sealed enclosure calc

 

[Earthman 10+ year member]

Yeah, thats what I was getting at
12+12 > 18 ... dur! //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

Everyone knows two 12's = 24"... what's so hard about that???
//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

I hope you both were being sarcastic. Sorry, I couldnt tell

 

[Rashaddd 5,000+ posts]

Total driver diameter =/= effective cone diameter //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

a typical 18 inch sub actually has more like 14.5 inches of effective cone diameter

 

[spencer321 10+ year member]

that and no offence im not saying it wasn't a good idea but aren't there like constants now for this? or pretty close

10" = 310cm^2

12" = 480cm^2

15" = 810cm^2

18" = between 1080-1210

 

[spencer321 10+ year member]

and to the people saying Pi*r^2... thats actually not correct its CONE area for a reason, its not "circle" area, unless you have a flat face the fact that its not flat and has depth is what makes it a cone and yes it creates even more surface area. a 10" cone that 2" deep will have more surface area than a 10" flat circle.

and btw to get CONE area... its Pi*r*s..... "Pi" is still pi, "R" is still the radius(from the inside of the surround to the inside of the suround, only effective piston area) "S" however would be the distance from the edge of the surround to the center of the dustcap and i mean literally from the end DOWN to the center not straight across like the radius. in other words, if you put a straight edge on top of your subwoofer from one side to the other to create a diameter, now take a washer on a string and hang it RIGHT over the dustcap dead center this is the "height of your cone" the distance from the top of the string to the surround is your radius, the difference from the washer sitting on the dustcap to your surround is "S"

for those of you who understand trigonometry, "S" is the hypotenuse

 

[80INCHES 5,000+ posts]

that and no offence im not saying it wasn't a good idea but aren't there like constants now for this? or pretty close
10" = 310cm^2

12" = 480cm^2

15" = 810cm^2

18" = between 1080-1210

u really cant say that cuz some companies measure there conearea different...some use 1/3 of the surround...some dont

80

 

[squeak9798 5,000+ posts]

and to the people saying Pi*r^2... thats actually not correct its CONE area for a reason, its not "circle" area, unless you have a flat face the fact that its not flat and has depth is what makes it a cone and yes it creates even more surface area. a 10" cone that 2" deep will have more surface area than a 10" flat circle.

Wrong.

Depth does not create more surface area. Sd will be the same regardless of cone geometry. The shape of the cone will not affect the swept volume as the shape of the cone is static throughout the motion of the subwoofer. So a deeper cone doesn't "add" anything.

Even then, the formula for cone area is not simply Pi*r^2 (using the diameter of the driver itself for "r")

and btw to get CONE area... its Pi*r*s..... "Pi" is still pi, "R" is still the radius(from the inside of the surround to the inside of the suround, only effective piston area) "S" however would be the distance from the edge of the surround to the center of the dustcap and i mean literally from the end DOWN to the center not straight across like the radius. in other words, if you put a straight edge on top of your subwoofer from one side to the other to create a diameter, now take a washer on a string and hang it RIGHT over the dustcap dead center this is the "height of your cone" the distance from the top of the string to the surround is your radius, the difference from the washer sitting on the dustcap to your surround is "S"
for those of you who understand trigonometry, "S" is the hypotenuse

//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

Where in the hell did you hear that //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

Per Vance Dickason in The Loudspeaker Design Cookbook;

Sd = (3.1416 * D^2)/4

Where D is the diameter of the cone (not diameter of the driver itself) plus one third of the surround at both ends of the measurement (though some companies use 1/2 of the surround).

You all fail.