GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Horn-Loaded Speakers
In the Thread: Battling stupid Horn Criticism as a concept

Post Subject: I dont know how, but it worksPosted by be on: 11/24/2012

Hi rowuk.

Shark skin decreases the formation of vortexes in fluid flows over surfaces and thereby reduces drag.
Shark skin resembles fine sand paper and has actually been used as such.
Of cource there is a difference between a stady flow around a shark and the forth and back movement of the air in a horn, but it could still make a difference, but how?
I certainly can hear a difference in the sound comming from the (well designed) horns where I tried it. It is noticeable in the high mids and up, where the sound seems to be cleaned up for a some noise and dirt.
At one stage I tried to cover the conical inner surface of the compression driver throat with sand paper on a very thin base, but with different grain sizes to find what worked best. The result was that corn size 200-400 was the best, using finer ones like corn size 1000 had less effect, the thickness of these papers where quite similar, but I did not check out the possible influence of this parameter.

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