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Active reduction of sound transmission through triple panel partitions: performance evaluation

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DOI:

https://doi.org/10.31224/2722

Keywords:

active noise control

Abstract

This paper deals with the development of a multi-channel ASAC controller for reducing sound transmission through triple panel partitions. The X-filtered version of the adaptive least mean squares (LMS) algorithm is implemented by utilizing up to eight (stack) piezoelectric actuators as control inputs and four microphones located in the radiated field as error sensors. The control signals to piezoelectric actuators are computed on the base of the noise signals measured at the error sensors. This approach is particularly useful for periodic noise disturbances, like propeller-induced noise for a turboprop aircraft, because they can be perfectly synchronised to the BPF. In addition, as an alternative to the multichannel version of the filtered-X LMS algorithm, the least maximum mean squares (LMMS) and the Scanning error LMS algorithms are investigated in order to control different types of primary sound fields. Harmonic disturbances till flat band-limited white noise excitations are considered. A variety of cases are studied by varying the number of control actuators to evaluate the amount of achievable attenuation.

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Posted

2022-12-09 — Updated on 2022-12-16

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