Bueno y aquí una pregunta directa:

Quote:
Originally Posted by Deboi

Are these negative considerations about Room EQ above the Schroeder frequency also valid for manual EQ (measuring the response in the MLP with an omnidirectional microphone)?



The "negative considerations" about broadband EQ apply to all measurements, but the ones you do yourself may be the most trustworthy. And the MLP is where performance matters most.

The first reason for the "negativity" is well described in my book. It shows that steady-state room curves are highly predictable from anechoic data - it is the off-axis radiation - early reflections - that dominate the curve shape. If there are irregularities in the room curve caused by an otherwise well designed loudspeaker having amplitude response problems, EQ can help. This is a rare event, as most competent designers aim for flattish, smooth on-axis response. If, as is more common, an irregularity is caused by frequency dependent directivity problems, EQ cannot fix it - you need a better loudspeaker, or an acoustically dead room.

The second reason involves discrete reflections that acoustically interfere at the measuring location, generating ripples. If these ripples are smoothed by EQ you have changed the on-axis - direct sound - performance of the loudspeaker which is the most important starting point for good sound. Two ears and a brain react very differently to acoustical interference than an omni mic. Humans distinguish between direct and reflected sounds on the basis of direction of arrival and timing. The mic and analyzer do not.