Hi I am trying to understand what the Excess Group Delay EGD is telling me, I wonder if could you tell me if this is correct.
If there is a large spike vertical in the group delay window. It is telling me that there is a reflection of X amount milliseconds, if this corresponds to a null in the FFT graph is it because there is destructive interference and it is cancelling out?
But if there is a null in the FFT graph and there is no spike in the group delay, then what is this null caused by room mode pressure, or something else?
Seems there are many spikes in the excess group delay the further up the frequency I go so I'm presuming that these are reflections in an untreated room.
But there are some in the lower range too, so this is where I am confused, what is causing the differences?
Thanks
If there is a large spike vertical in the group delay window. It is telling me that there is a reflection of X amount milliseconds, if this corresponds to a null in the FFT graph is it because there is destructive interference and it is cancelling out?
But if there is a null in the FFT graph and there is no spike in the group delay, then what is this null caused by room mode pressure, or something else?
Seems there are many spikes in the excess group delay the further up the frequency I go so I'm presuming that these are reflections in an untreated room.
But there are some in the lower range too, so this is where I am confused, what is causing the differences?
Thanks