audio filter project neil e. cotter associate professor (lecturer) ece department university of utah...
Post on 04-Jan-2016
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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
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