CONCEPTUAL TOOLS Audio Filter Project Neil E Cotter
- Slides: 5
CONCEPTUAL TOOLS Audio Filter Project Neil E. Cotter Associate Professor (Lecturer) ECE Department University of Utah
CONCEPTUAL TOOLS Overview • Goal: Build filter to pass low or high frequencies in audio signal • Equivalent to bass/treble controls on MP 3 player http: //www. guardian. co. uk/music/blog/2009/ dec/21/jazz-purist-found-wynton-marsalis http: //www. thatcable. com/category/ 6 -35 mm-(1 -4 inch)-Plug-to-Plug/sub http: //salestores. com/gegsdu 153 w 60. html http: //www. ebay. com/bhp/f 3 -cellphone-watch http: //news-releases. theurbanmusicscene. com/2009/01/27/ pedro-giraudo-jazz-orchestra--el-viaje. aspx
CONCEPTUAL TOOLS Overview • Goal: Build filter to pass low or high frequencies in audio signal • Equivalent to bass/treble controls on MP 3 player • Each group of students will design/build low-pass filter (more bass) or high-pass filter (more treble)
CONCEPTUAL TOOLS Overview • Goal: Build filter to pass low or high frequencies in audio signal • Equivalent to bass/treble controls on MP 3 player • Each group of students will design/build low-pass filter (more bass) or high-pass filter (more treble) • Theory first: Sound waves = sums of sinusoids (Fourier theory) Complex numbers can represent sinusoids (Phasors) Electronic components alter sinusoids— resistors, inductors, capacitors Filter design = sinusoid analysis (circuit theory)
