lab 6 - Fourier Transforms

lab 6 - Fourier Transforms - Physics 123 Lab #6 Fourier...

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Lab 6 – pg 1 Physics 123 Identification Number _________________ Lab #6 Fourier Transforms In this lab you will study the relationship between time dependent signals and their frequency spectrum (i.e., their Fourier transform). You will do this using a computer program which can generate or record waveforms or read-in pre-recorded waveforms. This program will display the waveform along with its Fourier transform. The first step is to go to the class website and click the “Lab 6 - Fourier transforms” link. You can run the applet and get additional help there. The next thing to do is to play with the program and make sure that you understand how to use it. In particular, make sure you understand how to zoom in and out on the graphs, and how to find the exact value of a point by right-clicking on it. Musical Octaves . Click on “RESET ALL”. This will set up the program to work with a “user defined” waveform and set the waveform equal to sin(2*pi*440*t) . This will generate a sine wave at 440 Hz (the A above middle C). Now, adjust the frequency (the 440) until you hear a tone which is one octave higher. Note the frequency below. Adjust the frequency again until the
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lab 6 - Fourier Transforms - Physics 123 Lab #6 Fourier...

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