MATLAB (matrix laboratory) is a multi-paradigm numerical computing environment and fourth-generation programming language. A proprietary programming language developed by MathWorks, MATLAB allows matrix manipulations, plotting of functions and data, implementation of algorithms, creation of user interfaces, and interfacing with programs written in other languages, including C, C++, Java, Fortran and Python.
The design principle is determined from the desired effect. In the case is needed to separate the sound caused by tapping the objects. MATLAB is a program that can do a lot, but in this format, we need results to calculate Fast Fourier Transform to convert the sound waves in the core domain of time. To the axis of frequency to simplify the calculation.