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Sound Signal Analysis Using FIR Filters for Musical Fountain Operation

Authors: Ali M. Jasim علي محمد جاسم --- Jawad R. Mahmood جواد راضي محمود --- Ramzy S. Ali رمزي سالم علي
Journal: Basrah Journal for Engineering Science مجلة البصرة للعلوم الهندسية ISSN: Print: 18146120; Online: 23118385 Year: 2016 Volume: 16 Issue: 2 Pages: 21-28
Publisher: Basrah University جامعة البصرة


In digital signal processing (DSP), FIR digital filter isvery important device to deal with particular frequencies of acertain signal to be appropriate for some applications such ascommunications, sound equalizers, etc. In this paper, FIRfilters are adapted to decompose the original sound signal intofour signals. Each one is created by one FIR filter and eachfilter represents a narrow band of frequencies. The filteroutput is used to drive a certain variable speed drive (VSD) tocontrol the speed of a water pump and light intensity of acolored lamp. This filter output signal is applied to the analogcontrol voltage terminals of the VSD unit to control thefrequency and magnitude of the voltage supplied to the lampand pump. Thus, the heads of the water jets and the lightintensity is controlled according to the analog control signalswhich are created by the FIR filters (The VSD is used to mapthe filter output into light intensity and water head bycontrolling the supplied voltage of them). The goal of this studyis to design and simulate four sound harmonics bandsproduced by FIR filters to drive four VSDs which aresimulated using V/F ratio constant method for musicalfountain operation.

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