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Critics for Room sizing and optimization at low frequencies paper

Excerpted from:
ideal_room.png
 
I have created an Excel-based calculator using the formula on the last page of the paper, in case anybody is interested (see attached)
 

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  • Room size calculator 2025.zip
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Toole Ch 8.1.1 "Optimizing Room Dimensions - Does an Ideal Room Exist?" references this paper.

"Cox et al found good agreement between modeled and real room frequency responses of a stereo pair of loudspeakers below 125Hz, but ended their investigation by concluding that "there does not appear to be one set of magical dimensions or positions that significantly surpass all others in performance".

In the rest of the chapter, Toole explains that computer simulations and models fail in the real world because these models rely on some assumptions - (1) that rooms are perfectly rectangular, with perfectly flat and highly reflective surfaces; (2) all modes are simultaneously excited by the a similar amount, (3) both source and listener are at fixed locations for the model to work, any departure from this location will cause the model to fail, (4) rooms are unfurnished.
 
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