[Previous Message]
[Next Message]
|
| Date: |
November 27, 2009 at 07:30:51 |
| From: |
Chris, [giro.gla.ac.uk] |
| Subject: |
Port Length |
|
|
|
|
I used the following equation to get the port length.
Lv = (23562.5*Dv^2*Np/(Fb^2*Vb))-(k*Dv)
where,
Dv = port diameter =7.6(cm)
Fb = tuning frequency =50.58(Hz)
Vb = net volume =111.68(litres)
Lv = length of each port (cm)
Np = number of ports =1
k = end correction (normally 0.732)
and I get an Lv = -0.79
but if I change the port diameter to 10cm I get Lv=0.92cm.
Does the fact that it doesn't have a negative sign effect the value? Also I was wondering why the port lengths are so small? not even 1cm? Just doesn't seem correct.
Thanks
Moderated By: brian@diysubwoofers.org
|
|
|
| View entire thread |
Posted with TalkShop version
2.77 BETA |
[Previous Message]
[Next Message]
|
|
|
Follow Ups: |
|
|
|
[
The Subwoofer DIY Page - Discussion Forum ] [ FAQ ] |
|
