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In the Forum: Horn-Loaded Speakers
In the Thread: Constant directivity = constant wavefront center?
Post Subject: Constant directivity = constant wavefront center?Posted by el`Ol on: 10/29/2007
Hello all!
Some people call omnidirectional spekers "Hallsoßenwerfer" (reverb sauce throwers), some people even accept price and sensitivity of an MBL 101. While I find the MBL too diffuse, I still find there is something special about a speaker being radial. In my experiments with fullrange drivers placed at the height of my ears I found they have to face the ceiling very close to 90° to produce that magical image, so it`s not just the ratio of direct and reflected sound, but there has to be something about being radial.
My attempt to explain this is the following: In a pistonic direct radiator there is not only more beaming in the higher frequencies, but also the center of the wavefront is moving backwards, resulting in a different wavefront radius at the listening position, which results in different interaural time delays.
My question: Is it sufficient for a horn to have constant directivity in order to have constant wavefront center over its frequency range, or how else would a "constant wavefront center horn" have to look like?
Regards,
OliverRerurn to Romy the Cat's Site