ClassNotes5 - Physics 434 Module 3 Acoustic excitation of a...

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Physics 434 Module 3 – Created by (and thanks to) T. Burnett 1 Physics 434 Module 3 Acoustic excitation of a physical system
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The theme of the next three weeks This week: operate in the frequency domain For a given frequency, what is the response? (resonances, etc.) Next week: time domain Excite with a pulse, measure response Following week: Fourier transform Relate to frequency domain measurement Physical system (the tube) Input signal Output signal
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3 Goals for this module Control and monitor an applied frequency Detect and measure a sound wave Generate set of RMS values vs. frequency Fit resonances to determine resonant frequencies and “Q” values Check speed of sound from resonance difference
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4 Signal generator (for checking) speaker ‘scope: microphone Breakout box ach0/ach8 dac0 Microphone, speaker Amplifiers tube
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5 Step 1 electronics, contued Adjust amplifier gains for given input (say 1 V) so that
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ClassNotes5 - Physics 434 Module 3 Acoustic excitation of a...

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