Huazhong University of Science and Technology
Visual Sound Instrument (Version 3.2)
Signal Menu
a). Digital Filtering
This function filter signal by the digital filter designed by Filter Design. Below is a square signal and its filtered signal by a low pass filter.
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b).Envelop Filtering
This function extract envelop of the signal by a band pass digital filter designed by Filter Design.. The center frequency of band pass filter is equal to frequency of carrier wave. Below is a beat wave and its envelop.
c).Filter Design
Design the filter used by Digital Filtering and Envelop Filtering. As shown below.
Filter Order: 1 < this <20
Fl(Low cut frequency): 0 < Fl < Fh
Fh(High cut frequency): Fl < Fh < 0.5

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[Return]
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2004.1.10