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Lab Notes: Week 7, Frequency Response, Physics 3LB at UCI $2.99   Add to cart

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Lab Notes: Week 7, Frequency Response, Physics 3LB at UCI

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Week 7 notes of Physics 3LB lab at University of California, Irvine. Notes are based on the course's lab manual and are intended to help you understand the theory of "Frequency Response."

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  • August 22, 2024
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Wk7: Frequency Response
Abbreviation Key:
Monday, February 17, 2020 1:55 PM
w/ = with
vs = versus
--> = thus, or therefore
Ex. = For example,
• Objective: We will measure resonance and distortion using cheap speakers, and Expt = experiment


use Fourier Analysis.


• Resonance: frequencies that maximize the energy transfer to the system.


• Response: ratio of detected signal to true signal. Measured / Theoretical


• An ideal detector of frequency response is a flat, horizontal line on a


Response(units V) vs Frequency(units Hz) plot.


○ The measured voltage is linearly proportional to the physical property being


measured. -->


○ A lot of behaviors of physical systems can be answered w/ frequency


response measure.


• A good detector gives a flat response over a restricted frequency range.


• A poor detectors exhibits resonances (maximum response).


○ Near resonance, the measured signal is due to of the properties of the
Independent: waveforms
Dependent: frequency response
detector, not the physical property being measured.

Can manipulate the signal given (alter frequencies
• Ex. Earthquake vs Skyscraper that meet system's sensitivity range) to show a
response.

○ To avoid a skyscraper falling down, the skyscraper must be designed in a way


so that its resonances avoid dominant frequencies of ground motion.

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