Lab3_Report2023_YourName

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Centennial College *

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1720

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Electrical Engineering

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Jan 9, 2024

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NATS 1720.06 Laboratory Report #3 Superposition & Interference of Sound Waves Name: Student # Section & Station # Date: Peer 1: Peer 2: Peer 3:
Part 1 – Two-Source Interference Speakers to “T” line (S) in meters: Speakers to centre line (D) in meters: Station’s assigned frequency (Hz): Use the table below to record the positions of amplitude maxima and minima when the microphone is moved away from the centre line towards the edge of the table. Distance (M) is measured from the centre line. Table 1 – Positions of Amplitude Max/Min Distance (m) Amplitude (Scope units) Max or Min Describe any challenges encountered in obtaining this data. Questions : At what location do you expect the signal detected by the microphone to be largest, and why? Did you observe this? How can reflections from the tabletop or the back wall mess-up detection of the expected two-source interference pattern?
Part 2 – Fourier Spectrum Chosen instrument recordings: , , . Describe the key visible differences between the Fourier spectra of the recordings. And comment briefly on the audible differences between the timbre of the sounds. Table 2 – Fourier Spectrum Peaks for . Frequency (Hz) Amplitude (dB)
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Part 3 – Sound Synthesis Smallest amplitude from Part 2 (eg. 53.1 dB): Offset = smallest amplitude – 36 dB = Table 3 – Track Amplitudes Track Frequency (Hz) Spectrum Amplitude (dB) (from Table 2) Track Amplitude (dB) Observations – Consistency of synthetic sound with original recording. Observations – Changes in sound with each added track. (Time-permitting) Questions : What aspects of the original sound are missing from the synthetic reproduction? What effects do you think could/should be added to the tracks to further improve the faithfulness of the reproduction?
How many pure tone tracks are needed before the synthetic sound is sufficiently like the original recording? (Time-permitting)