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Re: First Reflection Point Formula

I haven't seen that formula before.

The big difference between results is that Ethan's formula calculates a position along the wall from a point level with the listener. Mine calculates along the wall from a point level with the speaker.

Both formulas give the same point on the wall. Mine will give you 1.25 ft forward of the speaker plane using Ethan's example. His formula gives you 3.75 feet forward of the plane of the listening position. The distance between the 2 planes is 5 feet, which is 1.25' plus 3.75'.

So both formulae give you the identical point. Choose whichever is easier for you.

David Aiken

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