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Originally Posted by Haunz as I said a regular port that is the same length as a aero port will not be tuned to the same frequency........... and that must be the difference you speak of; and is probably what was being demonstrated.... |
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Originally Posted by Dukk Know anyone with a Clarinet? Take the bell off the end and replace it with a piece of straight tube the same length. Think it will sound the same? The answer is no. Why? |
Here you are both agreeing that flared port and straight port of the same length will not be the same, and you are both correct, because a flared port of the same length would have a higher Fb.
In terms of audibility, I have to argue that it would depend on the circumstances. I stand by my statement that a flared port is more efficient and aerodynamic than a straight port, but if your port velocity is below 15m/s to begin with, you would be hard pressed to notice a difference.
Now if you have designed an enclosure where port velocity is, say, 40m/s (like a large number of 4th and 6th order bp's out there), then using a flared port is a great idea. Port velocity would drop to ~24m/s (again, depending on the radius and length of the flare).
I see both points and I think both are accurate, but it comes down to audibility in specific situations.
