Performance analysis of an adaptive feedback active noise control based earmuffs system

Abstract

This paper analyzes the performance of the adaptive feedback active noise control (FBANC) based earmuffs system. The system’s noise reduction performance is obtained in a closed-form equation with respect to two top-level design constraining parameters, i.e., secondary path delay and noise bandwidth. To derive the equation, we utilize a simplified and equivalent linear prediction ANC model and parameterize noise bandwidth using an autoregressive model. The derived equation is validated by simulations and experimental tests performed for the ANC earmuff system. The high degrees of noise reduction, which are 14.9dB for the airplane noise and 20.4dB for the house heater noise, obtained from the experimental tests confirm the feasibility of the ANC earmuffs application.