| Idea for alternative to power tapering [message #22678] |
Sat, 25 June 2005 15:07  |
Abra Cadaver
Messages: 1
Registered: May 2009
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Esquire |
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I'm not suggesting that this will work, I'm just tossing it out as an idea. Instead of power tapering, how about making a fabric grill that has more layers of fabric on the outer drivers than the inner ones?
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| one of the first [message #22685 is a reply to message #22678] |
Mon, 27 June 2005 21:30  |
lcholke
Messages: 73
Registered: May 2009
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Viscount |
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Hi I saw this done in an old AES paper in the 1-25 audio anthology collection.(1962) It is still a clever idea. They used fiber glass. It must have worked for them to publish and install in a church. Their final unit was usable from 300 to 10khz with eq. The other old way is to rotate the drivers around a pole. -Linc
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| Re: Idea for alternative to power tapering [message #22728 is a reply to message #22678] |
Mon, 18 July 2005 13:54 |
Earl Geddes
Messages: 220
Registered: May 2009
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Master |
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As stated, this is not a new idea. Unlike constant power tapering, the absorption tapering is frequency dependent, which is an added degree of freedom to facilitate a better design. I use a similar principle in my waveguides to improve pattern control - a foam plug - and it works extremely well. It is an idea with a lot of potential, but it can be very difficult to actually design using.
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| Re: Idea for alternative to power tapering [message #22745 is a reply to message #22744] |
Fri, 22 July 2005 11:11 |
Earl Geddes
Messages: 220
Registered: May 2009
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Master |
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Open cell polyurethane foam comes in an extremely wide variety of cell density and is ideal for the application. Only a model or experimentation could determine what sizes and thicknesses would be required - guessing would probably be a waste of time.
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