Post on 02-Oct-2020
transcript
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 MP3 player
CONCEPTUAL TOOLS!
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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)
CONCEPTUAL TOOLS!
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)
CONCEPTUAL TOOLS!