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Reload Thread: Since we are on the subject of ports...

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    Hecta G's Avatar
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    Icon32 Since we are on the subject of ports...

    In the rendering below, I have done a cutaway for easier viewing and explaining. The port is behind a 3/4" MDF. The outer tube is open on one end and has an OD of 4".

    The inside tube has an OD of 2", both with a wall thickness of 1/16". Each tube is 6" long, and the arrows show the direction of air travel.

    My question is how can you calculate effective port length when comparing to standard cylindrical ports?




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    Re: Since we are on the subject of ports...

    wtf???????????????????????????


    why?




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    Re: Since we are on the subject of ports...

    interesting




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    Re: Since we are on the subject of ports...

    diffferent size ends.



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    Re: Since we are on the subject of ports...

    crazy ****



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    Re: Since we are on the subject of ports...

    Actually, it was something that I patented several years ago, and since I was young, had a crazy idea, built a prototype and actually worked.

    My problem was why it worked. Until now I haven't wondered too much about it but with some of the guys here really REALLY know more about acoustics than I do. I approached from a mechanical side and was wondering if someone here could explain it to me.

    I'm thinking about building some more to test and see if it makes any sense still.



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    Re: Since we are on the subject of ports...

    It's not really anything that new; take a look at bullhorns--they are a concentric folded horn, just like this but with exponentially increasing flare and loaded from the other end. But I have never seen this concept applied to ports.




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    Re: Since we are on the subject of ports...

    interesting design, aslong as the airflow is smooth, i don't see why it wouldn't work. as for calculating it, well thats not my cup of tea.



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    Re: Since we are on the subject of ports...

    So wait, you paid for a patent on something you don't understand and don't know how to design. Wow...



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    Re: Since we are on the subject of ports...

    Quote Originally Posted by Immacomputer View Post
    So wait, you paid for a patent on something you don't understand and don't know how to design. Wow...
    Your helpful...

    as usual...



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    Re: Since we are on the subject of ports...

    What's the patent number?



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    Re: Since we are on the subject of ports...

    Quote Originally Posted by Immacomputer View Post
    What's the patent number?
    5406637



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    Re: Since we are on the subject of ports...

    i took a look for the hell of it here it is
    http://patft.uspto.gov/netacgi/nph-P...&RS=PN/5406637



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    Re: Since we are on the subject of ports...

    in the images there, WOW...I'll buy 4



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    Re: Since we are on the subject of ports...

    Does this mean that no one here can calculate it?



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