| Try it!
Why not try a 'broadband absorber' on the floor? Shall we say something reasonable, a 2 -4 inch panel in the specular path to the mic?
Lets see the ETC or just the Impulse Response, before and after. I reckon the reflection spike will be severely diminished, but the frequency response dip will remain absolutely unchanged. If you can filter the ETC is some way, it should show considerable absorption at HF, none at LF. This pointless experiment should emphatically prove that you need thick absorbent panels to affect Bass frequencies. Kinda basic.
Also where is all this going? You are unlikely to be able to work with large areas of your floor covered with fibre.
No-one knows, and many very much dislike the fact that SAC, aka the banned foxfyr, repeatedly makes these completely unhelpful and mysteriously insulting contributions. It is unfortunate.
DD
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