Home Speaker Asylum

General speaker questions for audio and home theater.

Diffraction and front baffle and cabinet design

Dude, I'm not looking for a fight. And guys like John Kreskovsky, John Krutke, Jeff Bagby, and Dennis Murphy -- all of whom have done design consultation for high-end manufacturers, and have decided to share their knowledge with the DIY community out of love of the hobby -- are hardly "novices."

Please see the linked article, published by Harry F. Olson in the JAES way back in 1950. Graphs 6-17 show the measured effects of diffraction on frequency response, caused by different baffle configurations. The sphere and the rectangle with deeply chamfered edges (he didn't test any roundovers) clearly show the best responses. This is not new information, and I doubt if the laws of physics have changed in the interim.

You can easily model the effects for yourself, with cheap/free software such as The Edge, or Baffle Diffraction Simulator from the FRD consortium, or more advanced professional software like Sound Easy.


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