Historically, the concept of an active noise control (anc) system emerged in the initial stages of the electronics revolution, when the commercial application of the vacuum tube amplifier was being developed into radio, television, talking pictures, etc. Only in the 1980's were systems for very special applications developed with varying success. These special applications include noise cancellation systems for low-frequency noise, typically in confined spaces. This U.S. Bureau of Mines paper focuses on investigating the performance of a prototype commercial anc system developed for a personal hearing protection device. The objective was to study the performance of the anc system under controlled, ideal, and nonideal situations, and to assess how this performance would change.
Paper in Noise-con 90. Univ. Texas, Austin, 1990, PP. 151-155