Digital control of local sound fields in an aircraft passenger compartment

Abstract

Active noise control has been shown to be a promising solution for reducing noise levels in turboprop aircraft. The first part of this paper shows the performance of a broadband active noise control system based upon an off-line frequency domain model obtained from response measurements. A laboratory test in an 18 passenger airplane fuselage resulted in 10-20 dB reduction of broadband deterministic noise over a substantial frequency range