1. ## educate me on group delay and phase response

expleain these two concepts to me please

hello?

hello

4. ## Re: educate me on group delay and phase response

group delay:

Group delay describes how long spectrally infitesimally narrow sine burst signal takes to travel through speaker's acoustic "filter". The flatter the group delay, the better. The value itself is not a concern, other that if delay becomes too large, then it might be difficult to match the design to other speaker's which might have less group delay. Large groupdelay variations usually means large ringing when transient signals are applied to the system. Mathematically it is the derivative of negative phase versus frequency in radians/sec. So when phase changes linearly versus frequency, then the group delay has a constant value. If that seems to hard to think, think it as follows: Take a number of people, where each individual represents a particular frequency. Now, send them simultaneously running to specific target. If they all reach the target at same time, then group delay is flat. They all take same time to reach the goal. Now, if some of those are in worse shape than others, they'll arrive later than others. Now, the group delay is not constant, and different frequencies will arrive at different times. That's group delay.

5. ## Re: educate me on group delay and phase response

Originally Posted by PowerNaudio
group delay:

Group delay describes how long spectrally infitesimally narrow sine burst signal takes to travel through speaker's acoustic "filter". The flatter the group delay, the better. The value itself is not a concern, other that if delay becomes too large, then it might be difficult to match the design to other speaker's which might have less group delay. Large groupdelay variations usually means large ringing when transient signals are applied to the system. Mathematically it is the derivative of negative phase versus frequency in radians/sec. So when phase changes linearly versus frequency, then the group delay has a constant value. If that seems to hard to think, think it as follows: Take a number of people, where each individual represents a particular frequency. Now, send them simultaneously running to specific target. If they all reach the target at same time, then group delay is flat. They all take same time to reach the goal. Now, if some of those are in worse shape than others, they'll arrive later than others. Now, the group delay is not constant, and different frequencies will arrive at different times. That's group delay.

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