Active Adaptive Noise Control: The First Phase
Abstract
This report is a study of the development of an active, adaptive noise control system for a 4" I.D. duct. The study yielded the development of a series of circuits to be incorporated with a microprocessor in a continuous feedback loop. The four component circuits developed were: fixed and variable gain amplifiers, an AC/DC rectifier and a phase shift circuit. Each circuit was tested and operating characteristics and limitations for each component were determined. The complete system can attenuate signals between 90 hz and 1800 hz, with attenuations ranging from 28 to 34dB.
Description
Program year: 1982-1983Digitized from print original stored in HDR
Subject
noise control systemadaptive
signal attenuation
gain amplifiers
AC/DC rectifier
phase shift circuit
Citation
Lawrie, Pamela (1983). Active Adaptive Noise Control: The First Phase. University Undergraduate Fellows. Available electronically from https : / /hdl .handle .net /1969 .1 /CAPSTONE -LawrieP _1983.