Analysis and Simulation of an Audio Adaptive Equalizer
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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The purpose of this thesis was to explore the feasibility of replacing a manual audio equalizer with an adaptive filter that adaptively equalizes the spectral distortion of an audio system. The impulse response of an audio system which includes the response of the speaker crossover network, the power amplifiers, speakers, and the acoustic transfer function between the systems input signal spectrum. The Adaptive Inverse Pre-filter, the Filtered-x algorithm, and the Adaptive Inverse Modeling Control System are investigated which remove the distortion by pre-filtering the audio systems input signal with the audio systems inverse. The audio system examined is the Armstrong Aerospace Medical research Laboratorys Performance and Communication Research and Technology reverberation chamber located at Wright-Patterson Air Force Base. Keywords Digital filters Adaptive filters Audio frequency Equalization.
- Electrical and Electronic Equipment
- Radio Communications