# volume of odd shaped box?

bigjohnny
Copper - Posts: 293
Joined: September 23, 2008
Location: Ontario, Canada
Posted: June 27, 2012 at 11:42 AM / IP Logged
Long time no see... I believe it's been maybe 5 years since I was here last.
I finally got a basic system in my car so many years later.
Long story short, the box I have is shaped funny and I need to know the volume because I think the port size is wrong as it makes a kind of chirping noise at loud levels. This goes away when I shove my arm in the port thus making it smaller.
The box is kind of shaped like this, sort of a trapezoid.
how do i find the volume of this shape?
bigjohnny
Copper - Posts: 293
Joined: September 23, 2008
Location: Ontario, Canada
Posted: June 27, 2012 at 12:09 PM / IP Logged
I think i just found a calculator here that will help me
EDIT
Nope, not quite the same....wouldn't give me accurate results.
i am an idiot
Platinum - Posts: 13,491
Joined: September 21, 2006
Location: Louisiana, United States
Posted: June 27, 2012 at 1:23 PM / IP Logged
Divide it up into rectangles and triangles. Or put some inside dimensions on the drawing, along with the inside width and tell us if it has a divider.
or buy enough shipping peanuts to fill the enclosure. Build a 1 cubic foot box and begin dumping the peanuts into the box. Count the number of times the peanuts fill the box.
bigjohnny
Copper - Posts: 293
Joined: September 23, 2008
Location: Ontario, Canada
Posted: June 28, 2012 at 7:40 AM / IP Logged
I think I got it.... I used the calculator available here. It occured to me that the angles themselves shouldn't make a difference to the volume if the measurements are correct, and this works out to 3 Cubic Feet.
so using the port calc, a port of 4" dia 9.25" long should be tuned to about 30Hz.

## Sorry, you can NOT post a reply.This topic is closed.

 You cannot post new topics in this forumYou cannot reply to topics in this forumYou cannot delete your posts in this forumYou cannot edit your posts in this forumYou cannot create polls in this forumYou cannot vote in polls in this forum

•
 Search the12volt.com
Follow the12volt.com
Sunday, January 23, 2022 • Copyright © 1999-2022 the12volt.com, All Rights Reserved
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Top