the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

volume of odd shaped box?


Post ReplyPost New Topic
< Prev Topic Next Topic >
bigjohnny 
Copper - Posts: 293
Copper spacespace
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.
volume of odd shaped box? -- posted image.
how do i find the volume of this shape?
bigjohnny 
Copper - Posts: 293
Copper spacespace
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
Platinum spaceThis member consistently provides reliable informationspace
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
Copper spacespace
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.

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Sunday, January 23, 2022 • Copyright © 1999-2022 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
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.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer