Seminars in Hearing, Table of Contents Semin Hear 1990; 11(1): 39-67DOI: 10.1055/s-0028-1091336 Copyright © 1990 by Thieme Medical Publishers, Inc.Approaches to Noise Reduction in Analog, Digital, and Hybrid Hearing AidsDavid A. Preves Argosy Electronics, Research and Development Department, Eden Prairie, Minnesota. Recommend Article Abstract PDF Download Buy Article PDF (1971 kb)