5. Fundamental Concepts in Frequency Domain Signal Processing

Try these first

1. 1.

   What do we measure frequency in?

   Hint

   Think about how many cycles happen in one second.

2. 2.

   What does the amplitude spectrum show?

   Hint

   Consider what aspect of the frequencies it reveals.

3. 3.

   What is the unit used for measuring frequency?

   • Volts
   • Hertz
   • Newton

   Hint

   Think about the cycles in a wave.

4. 4.

   True or False: The amplitude spectrum provides information about the phase of a signal.

   • True
   • False

   Hint

   Recall the different roles of amplitude and phase spectra.

5. 5.

   A structural health monitoring system detects a frequency shift of a bridge from 10Hz to 12Hz. What implications does this have for the structure?

   Hint

   Consider how stiffness correlates with frequency.

6. 6.

   Given a signal with a power spectral density plot emphasizing peaks at certain frequencies, how would you isolate the desired frequency band using filters?

   Hint

   Influence of bandwidth on filtering choices is crucial here.