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."
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.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller PrinceAlixD. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $2.99. You're not tied to anything after your purchase.
