There are many who are looking to build slot ported enclosures with as narrow of a port as possible.
Based on searching around, I have seen some comments like "keep it to a minimum of 2" height" or "don't go lower than an 8:1 width:height ratio", but I couldn't find any really good data to back those claims up, hence this post.
While WinISD models air speed based on cross-sectional area only, so it predicts the same results for a circle as a paper thick port so long as they have the same area, I suspect that this is missing something big.
It has been shown that port chuffing is more of a problem with higher tunings and higher air velocity, so that is not really what I am looking for here, just the missing piece of the puzzle that makes slot ports perform worse than round ports if they get too narrow.
If anybody can link up a study of varying slot port height and audible chuffing/whistling/noise, or even provide some anecdotes based on builds, that would be much appreciated.
Thanks in advance for your replies.