[Seamus TM]

Originally Posted by SAC

This refers to the classic diagram originally sourced from Bolt, Beranek and Newman portraying the 'controllers of steady state room acoustic response' for LARGE acoustical spaces.

This describes the behavior about the critical frequency, fc , as well as the large room frequency as defined by Manfred Schroeder, FsubL. The critical frequency, fc, is synonymous with FsubL, and you will see both notations used. While fc refers to the characteristic as it exists in any acoustical space, the FsubL nomenclature refers to when a space effectively becomes “large” in its acoustical behavior.

I already, mostly, understand what the Schroeder Frequency represents and how it relates to RT60 and reverberant vs direct sound.
I did not fully realize that it is not meant for smaller rooms because of this:

Originally Posted by SAC

Note, that a small acoustical space lacks a substantial reverberant sound field that rises above the ambient noise floor. Hence this equation in this form describes the large acoustical space where a statistically reverberant space exists.

Originally Posted by SAC

This refers to the classic diagram originally sourced from Bolt, Beranek and Newman portraying the 'controllers of steady state room acoustic response' for LARGE acoustical spaces.

This describes the behavior about the critical frequency, fc , as well as the large room frequency as defined by Manfred Schroeder, FsubL. The critical frequency, fc, is synonymous with FsubL, and you will see both notations used. While fc refers to the characteristic as it exists in any acoustical space, the FsubL nomenclature refers to when a space effectively becomes “large” in its acoustical behavior.

I already, mostly, understand what the Schroeder Frequency represents and how it relates to RT60 and reverberant vs direct sound.
I did not fully realize that it is not meant for smaller rooms because of this:

Originally Posted by SAC

FsubL is a transitional area. Where the behavior shifts from that of a small acoustical space to a large acoustical space (per Schroeder). This critical frequency, fc, varies as the signal wavelengths progressively become equal to, and shorter than the various room dimensions and as their behavior shifts from the pressure model that characterizes the modal region into the ray/particle model characterized by the dominance of specular reflections.

I love it.
Totally understood.

Originally Posted by SAC

What is most important is to recognize the shift in behavior and methods used to characterize and also to measure said responses based upon the predominant determinant behavior in each region.

You lost me.

So, my room is only about 2,800 cubic feet.
I should be looking into the Davis?




Thanks,
Seamus