is port tuning determined ONLY by port area??
#1
Is the tuning freqency of a box determined only by the port area, or also by the dimension of a port? For instance, If I had one port that was say 12" high x2" wide x 10" deep that caused a box to be tuned to 36hz that would be 240"^2 of port area. If I had a 10" high x 4" wide x 6" deep port also being 240"^2, would it still be tuning the SAME box to 36hz?
Thanks
Thanks
#4
Ok lets see if I have this right here....
In addition to enclosure volume, the depth/length of the port MUST be constant too?
Also, if the port is say 10" tall by 2" wide, can I change it to 8" tall by 2.5" wide to keep the same tuning?
So basically the 3 constants here to follow are:
1)Enclosure net volume
2)Port surface area
3)Port Depth
...where every other dimension involved can be altered, correct?
In addition to enclosure volume, the depth/length of the port MUST be constant too?
Also, if the port is say 10" tall by 2" wide, can I change it to 8" tall by 2.5" wide to keep the same tuning?
So basically the 3 constants here to follow are:
1)Enclosure net volume
2)Port surface area
3)Port Depth
...where every other dimension involved can be altered, correct?
#7
To figure tuning of your current enclosure
Fb = 0.159*Sqrt[Av*1.84*10^8/(Vb*1728*(Lv+0.823*Sqrt(Av)))]
To figure the length needed to tune your enclosure to the desired frequency
Lv = Av*1.84*10^8/[Vb*1728*(Fb/0.159)^2] - 0.823*sqrt(Av)
Lv = Length of port in inches
Av = Port area in square inches
Vb = Net internal volume of enclosure in cubic feet
Fb = Tuning frequency of enclosure in hertz
Sqrt = Square root
[ August 27, 2004, 05:03 PM: Message edited by: Jmac ]
Fb = 0.159*Sqrt[Av*1.84*10^8/(Vb*1728*(Lv+0.823*Sqrt(Av)))]
To figure the length needed to tune your enclosure to the desired frequency
Lv = Av*1.84*10^8/[Vb*1728*(Fb/0.159)^2] - 0.823*sqrt(Av)
Lv = Length of port in inches
Av = Port area in square inches
Vb = Net internal volume of enclosure in cubic feet
Fb = Tuning frequency of enclosure in hertz
Sqrt = Square root
[ August 27, 2004, 05:03 PM: Message edited by: Jmac ]
#9
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