Journal
APPLIED ACOUSTICS
Volume 96, Issue -, Pages 53-60Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apacoust.2015.03.006
Keywords
Active noise control; Earmuffs; Linear prediction; Secondary path delay; Noise bandwidth; Noise reduction
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Funding
- Chung-Ang University
- Korea National Research Foundation [20100786]
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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 14.9 dB for the airplane noise and 20.4 dB for the house heater noise, obtained from the experimental tests confirm the feasibility of the ANC earmuffs application. (C) 2015 Elsevier Ltd. All rights reserved.
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