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Topic: Smearing excitation patterns (Read 4194 times) previous topic - next topic
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Smearing excitation patterns

Is it normal that, in PEAQ FFT model, energy in the loudest critical band goes from 93 to 85 dB after applying smearing over frequencies?

Smearing excitation patterns

Reply #1 –
After some time I realised that I was not familiar enough with all that is calculated in PEAQ (not yet)
Excitation patterns actualy represent level below which sounds are imperceptible. And Pitch patterns represent total loudness of all sounds present in a critical band.
At least I think that it is like that.

Smearing excitation patterns

Reply #2 –
Well, the cochlea doesn't add a lot, if any, energy to a signal. Therefore, if a filter spreads energy over more than one ERB, the energy in the central ERB had better go down some, shouldn't it?
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J. D. (jj) Johnston

Smearing excitation patterns

Reply #3 –
Quote
Therefore, if a filter spreads energy over more than one ERB, the energy in the central ERB had better go down some, shouldn't it?
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I think you are right.
But the main point is what do "exictation patterns" in PEAQ represent and that can be concluded from the place where they are are used for calculations. I am still working on that and when I learn more I will try to explain it more here.

Smearing excitation patterns

Reply #4 –
Hi..

  I have just started work on the advanced PEAQ. I have been reading most of the related discussions and messages posted on HA from quite some time. I would like to know of your progress with adv-PEAQ and if you have found any documentation about implementation of EAQUAL..and how to proceed further..building on the same model.

Regards,
Mahalakshmi