how do you figure up the port area

[Lakota 5,000+ posts]

WARNING, This thread contains complicated math that has been answered redundantly in the previous 100 threads.

 

[ultimate157 5,000+ posts]

It was already given to you.
Length x height=port area.

Width x Height //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[ultimate157 5,000+ posts]

You could always take the integral from 0 to width under the height to get the port area as well.

 

[BuckyBoy 10+ year member]

ok thanks and also would that be louder or would 3 4inch aeros at 16.02inches be louder both same tunning subs and power and same net for subs

Holy shit. You have asked the same questions about 55 times in the past week. Everything has been answered numerous times for you. I have made 15 designs and after each one you decide "it won't be loud enough because someone on f150 forums told me so"

Although it may seem like it sometimes, this shit isn't rocket science. When we tell you something will sound good, it will sound good.

 

[Lakota 5,000+ posts]

You could always take the integral from 0 to width under the height to get the port area as well.

True. This is how I find the area of circles and squares.

 

[tommyk90 5,000+ posts]

Width x Height //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

oopsie.

Trying to repeat myself over and over ftl.

 

[ultimate157 5,000+ posts]

oopsie.
Trying to repeat myself over and over ftl.

Heh.

Quick question: When determining port length and area displaced, I saw some talk about end-of-port correction (When talking about real world application, harmonics)

Does the effect of the opening of the port on the sound waves need to be taken into account when determining proper port length and width?

 

[tommyk90 5,000+ posts]

Heh.
Quick question: When determining port length and area displaced, I saw some talk about end-of-port correction (When talking about real world application, harmonics)

Does the effect of the opening of the port on the sound waves need to be taken into account when determining proper port length and width?

I've never, ever calculated for end correction when I've made any of my boxes, slot port or aeroport, if that says anything to you.

When doing simple calculations in winISD i've only seen a variation of 1-2 hz in the tuning frequency with end correction factored in, too little for concern IMO.

 

[PV Audio 5,000+ posts]

You could always take the integral from 0 to width under the height to get the port area as well.

Would that even be a function though? I guess 0-3 if f(x)=port height, but I dunno. I'ma try that out though //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[PV Audio 5,000+ posts]

Heh.
Quick question: When determining port length and area displaced, I saw some talk about end-of-port correction (When talking about real world application, harmonics)

Does the effect of the opening of the port on the sound waves need to be taken into account when determining proper port length and width?

No, not really. End correction for most enclosures comes out to be around 1hz difference anyway, and for a large enclosure, it makes next to no difference.

 

[ultimate157 5,000+ posts]

Would that even be a function though? I guess 0-3 if f(x)=port height, but I dunno. I'ma try that out though //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

it would just be a definite integral of a constant. Works out to be 15.5x from 0 to 4. 15.5(4)-15.5(0) = 62 in^2 //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Lakota 5,000+ posts]

Just use double integration and forget the function. You all are making it difficult.

 

[PV Audio 5,000+ posts]

****, let's laplace this shit while we're at it! //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[Lakota 5,000+ posts]

****, let's laplace this shit while we're at it! //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

I try to leave my memories of Calc 2 behind me. I hated that class.