Practice Leakage (7.2) - Frequency Domain Signal Processing and Analysis

Practice: Leakage

Lesson 7.2Frequency Domain Signal Processing and Analysis

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8 questions

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6 questions · about 4 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is leakage in frequency analysis?
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Think about how frequency peaks might be changed.
Question 2.
Name a common windowing function.
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Consider functions used to smooth signals.
3Question 3.
What is the main cause of leakage in frequency analysis?
- Signal frequencies aligning perfectly
- Signal frequencies not matching FFT bin centers
- Smoothing the signal
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Focus on how alignment affects the representation.
4Question 4.
True or False: Applying a windowing function before FFT can help to reduce leakage.
- True
- False
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Think about how changing a signal can impact its analysis.
Question 5.
A signal shows two distinct frequency peaks at 10 Hz and 50 Hz, but due to leakage, only a peak at 40 Hz is observed in the spectrum. Discuss how this misrepresentation can critically impact the application in monitoring.
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Consider what happens when frequencies that signify problems are masked.
Question 6.
Given a signal sampled over a short duration with a specified sampling rate, calculate the expected frequency resolution and discuss the potential impact of leakage in this context.
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Relate the sampling and duration terms back to resolution in frequency analysis.

4 more questions in this section. Enroll free to practise them all.