EE 313 Linear Systems and Signals - Lecture 4

Before Lecture

• "ABC", Jackson 5.
  Performed Feb. 21, 1970, on Bandstand, three days before song was released.
  #1 hit. Song inducted into Grammy Hall of Fame on Nov. 7, 2016.
  Jackson 5 inducted into the Rock and Roll Hall of Fame in 1997.
• Time-frequency representations of music:
  • "Sandstorm" by Darude, 1999, requested by a Fall 2016 EE 445S student**. Played Live
  • "B52s Rock lobster piano tutorial", Szpilman, Nov 28, 2017.
  • "La Styrienne", Johann Friedrich Burgmuller, Opus 100 no. 14, composed in the 1800s.

Announcements

• Mini-Project #1 is due by 11:59pm on Friday, Sep. 20, 2024.

Lecture

• Lecture slides on Time-Frequency Spectrum in PowerPoint format.
  • Fall 2024 Part 1.
    • Discrete-time signals always have a finite number of Fourier series coefficients
  • Fall 2024 Part 2. Spectrograms.
    • Tradeoff between time and frequency resolution
    • Hamming window helps reduce high frequency artifacts in spectrograms
  • Demo. Vibrating guitar strings making music, pbrown9, Jun 7, 2011.

Supplemental Information

• Fall 2023 Part 1: Hamming window helps reduce high frequency artifacts in spectrograms
• Fall 2023 Part 2: Wavelength vs. frequency and chirp signals
• Fall 2018: Lecture notes taken by Mr. Houshang Salimian (TA) on Sept. 18, 2018.

Last updated 09/25/24. Send comments to Prof. Evans at bevans@ece.utexas.edu