Posted by jdybnis [ 66.215.90.214 ] on February 16, 2005 at 01:39:31:
In Reply to: Re: Thoughts on focused arrays and the phase problem posted by Dave Peterschmidt on February 15, 2005 at 15:26:51:
Here are a couple of thoughts...
In the frequency range where drivers operate in a nearfield line array, they are omnidirectional. So the angle of the driver will not make a difference. However the driver will interact with the baffle edges, the steps will make a difference there. On a large flat baffle a driver's wavefront is a coherent semi-shphere. When the wavefront encounters an edge of the baffle it defracts causing interference. This should be taken into account when designing any speaker. On a stepped baffle it will be more significant than a simple box. There will be interference above and below each driver, not only from the adjacent edges but also from the edges further away from each driver.
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