Your instructor will demonstrate how to use DataStudio with the Pasco interface and a microphone to look at the waveforms (Scope in DataStudio) produced by various sources of sound or other devices (e.g., those wave patterns produced by your function generator). This program will also analyze your waveform and tell you the frequency distribution (FFT in DataStudio) from which your waveform can be reconstructed (i.e., it will tell you the sinusoidal components of your complicated wave). Thus you will be able to analyze the sound as both amplitude vs. time (scope) and amplitude vs. frequency (FFT). Note: the time and frequency scales for these two signal analyzers are connected. Changing the frequency scale on the FFT changes the time scale on the scope.
To guide you in learning about Fourier analysis, you should do the following (at a minimum):
1. Display and analyze the waveform from your speaker as it produces a 1000 Hz sinusoidal signal.
2. Display and analyze the 1000 Hz square wave that is produced by your function generator and look at other frequencies up to 2000 Hz. Do you see a pattern?
3. Display and analyze the waveform produced by a tuning fork.
4. Display and analyze the waveform produced by your voice.
In each case, make sure your notebook contains a sketch or printout of your analysis; this includes both amplitude vs. time (scope) graphs and amplitude vs. frequency (FFT) graphs.