5BL+Lab+Worksheet

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University of Notre Dame *

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Electrical Engineering

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Dec 6, 2023

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5BL Lab 5 WHEN FINISHED FILLING OUT THE SLIDES, SAVE THIS AS A PDF AND UPLOAD IT TO CANVAS Slide 2 (Measurement 1): [2 pts] What was the highest and lowest pitch you could hear? Left ear: 13-14325 Hz Right ear: 17- 10978 Hz
How did the loudness vary with frequency? The loudness changed with frequency by being a very high pitch which results in more peaks and the number of peaks Slide 3 (Screenshots): Audio-scope for a high and low pitch [2 pts] 2
Low pitch High pitch Slide 4 (Screenshots): Audio-scope for a loud and silent tone [2 pts] 3
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Loud tone Silent tone Slide 5 (Measurement 3 & 4): Unknown tone [4 pts] 4
Screen shots of Fourier spectrum (both log and linear scale, similar to figure 5): Calculation of the period of the mystery tone measured from audio-scope (show your work) Frequency: _576.546453 Hz___________ _ Peak frequency from Fourier spectrum: 575.98 Hz________________ 5
Slide 6 (Measurement 5): Fourier spectrum and audio-scope trace of two different tones from your instrument You need 4 screenshots total. [2 pts] Instrument: ____wine glass__________ First tone Fourier spectrum Second tone 6 Audio scope
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Fourier spectrum 7 Audio scope
Slide 7 (Measurement 5): Pick one tone. [8 pts] 8
Frequencies of the first four peaks in your instrument Fourier spectra expressed in Hertz and as ratio to 9 2n d peak frequency, ratio to the fundamental frequency (n) , wave -pattern 4t h peak frequency, ratio to the fundamental frequency (n) , wave -pattern
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the fundamental frequency (n). Sketch the standing wave-pattern for each frequency 10
11 1s t peak frequency, ratio to the fundamental frequency (n) , wave -pattern 3 rd peak frequency, ratio to the fundamental frequency (n) , wave -pattern