The Aperatures are diffusion, resonator & absorption in one relatively small panel.
Hey @slaw i am not an expert, but when a single panel is a combination of absorber/diffusor exactly like this Wavewood it depend on the effective fequency range. This particular panel is also act both as an absorber and dffuser and effective in treating medium and high frequencies (also can be used as bass traps in the corners).
In the beginning i was thinking that i can only use this universal panel for my needs, but after i got the actual 3D model of my room from from acoustic specialists i realize that separate panels such as primary bass traps or multifuser are much more effective when we can to cover a wider frequency range to make a room much closer to the ideal acoustic room. Unfortunately one multifunction panels is always a compromise. Also bass traps can not be small.
They made a similar looking panel Wavewood Premium which act primary as diffuser comapred to the different Wavewood absorber/deffusor/basstrap. There is a graph for each to see the frequency range they are covering, they are different.
I think it’s impossible to make one panel to act like 3 different panels effectively.