anchor sound in mushra

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zohreh saba
zohreh saba 2015-6-17
hi
I want produce anchor from target sound, how can do it?
The standard anchor is a low-pass filtered version of the original signal with a cut-off frequency of 3.5 kHz;
in mushra mention anchor made bellow instruction.
. The standard anchor is a low-pass filtered version of the original signal with a cut-off frequency of 3.5 kHz; The characteristics of the 3.5 kHz low-pass filter should be as follows: fc = 3.5 kHz Maximum pass band ripple = ±0.1 dB Minimum attenuation at 4 kHz = 25 dB Minimum attenuation at 4.5 kHz = 50 dB. how can effect Minimum attenuation at 4.5 kH z and Minimum attenuation at 4 kHz and Maximum pass band ripple ?

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