experiment3

# Physics 1021 experiment 3 part ii beats understanding

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Unformatted text preview: art II: Beats Understanding the FFT Ring one tuning fork near the microphone and click Collect. Only strike the tuning fork with the mallet! The top graph is called the waveform. It is a sinusoidal graph. It has a distinct period and therefore a distinct frequency. Highlight the peak to peak distance of five oscillations of your waveform as shown. PHYSICS 1021 Experiment 3 Part II: Beats Understanding the FFT The total time for the five oscillations is given as x in the lower right hand corner of the screen. Record the total time in Table 1. Using the total time, determine the period of the oscillation and record this in Table 1. Using the period, determine the frequency of the oscillation and record this in Table 1. PHYSICS 1021 Experiment 3 Part II: Beats Understanding the FFT The lower graph is the FFT or spectrum. It shows the frequency present in the waveform. Activate the FFT graph by clicking on in. Click Analyze then Examine. Move the mouse over the peak on the spectrum. The value of the frequency is displayed in the popup box. QUESTION 1: According to the spectrum, what is frequency present in the waveform? Does this value agree with your frequency calculated in Table 1? Do they both agree,within a few hertz, with the value stamped on the tuning fork? PHYSICS 1021 Experiment 3 Part II: Beats Measuring the beat frequency Click Collect in LoggerPro. Ring two tuning forks at the same time using the mallet. Keep the forks as close to each other as possible without touching. You may need a few tries to get this to work. Hold them both near the microphone. The FFT graph should show the two frequencies of your tuning forks with about the same amplitudes. If they do not, repeat the data collection until they do. PHYSICS 1021 Experiment 3 Part II: Beats Measuring the beat frequency QUESTION 2: QUESTION 3: QUESTION 4: Sketch the waveform. Indicate the period of the beats on the sketch. Highlight one cycle of the oscillation an...
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## This note was uploaded on 02/13/2014 for the course PHYS 1021 taught by Professor Draharlick during the Fall '14 term at Memorial University.

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