Audio Filter Project Neil E. Cotter Associate Professor (Lecturer) ECE Department University of Utah CONCEPTUAL TOOLS
Jan 04, 2016
Audio Filter Project
Neil E. CotterAssociate Professor (Lecturer)
ECE DepartmentUniversity of Utah
CONCEPTUALTOOLS
Overview
• Goal:Build filter to pass low or high frequencies in audio signal
• Equivalent to bass/treble controls on MP3 player
CONCEPTUALTOOLS
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Overview
• Goal:Build filter to pass low or high frequencies in audio signal
• Equivalent to bass/treble controls on MP3 player• Each group of students will design/build low-pass filter (more bass) or high-pass filter (more treble)
CONCEPTUALTOOLS
Overview
• Goal:Build filter to pass low or high frequencies in audio signal
• Equivalent to bass/treble controls on MP3 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)
CONCEPTUALTOOLS