ORCID Profile
0000-0002-7463-0932
Current Organisation
Indian Institute of Science Bangalore
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Publisher: Elsevier BV
Date: 07-2020
Publisher: Springer Science and Business Media LLC
Date: 07-08-2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2017
Publisher: Elsevier BV
Date: 07-2017
Publisher: Elsevier BV
Date: 02-2021
Publisher: MDPI AG
Date: 25-07-2019
DOI: 10.3390/APP9152973
Abstract: The presence of control signal feedback to the reference microphone in feedforward active control systems deteriorates the control performance. A four-stage method is proposed in this paper to carry out online feedback path modelling with the control signal. It consists of controller initialization, feedback path modelling using decorrelation filters, active control operation, and feedback path change detection for maintaining the control operation. In contrast to the existing auxiliary noise injection method, the proposed method uses five switches and three thresholds to control and maintain the system stability by avoiding the interference between control operation and feedback path modelling, and adaptive decorrelation filters are used to increase the feedback path modelling performance. Simulation results reveal that the proposed method is capable of tracking feedback path changes without injecting any auxiliary noise and maintaining the noise reduction performance and stability of the system.
Publisher: Acoustical Society of America (ASA)
Date: 06-2020
DOI: 10.1121/10.0001401
Abstract: Due to their low computational complexity, reduced wiring cost, and flexibility of scaling up, decentralized multiple channel active control systems are attractive in many applications. In a decentralized multiple channel active control system, a number of small subsystems are constructed, which are updated independently with only the associated error signals. In this letter, a time domain two channel decentralized control algorithm is proposed to achieve the similar noise reduction performance as the centralized one. Auxiliary filters are introduced to filter the reference signal for control filter update and a unique design method is proposed to shape the frequency response of the auxiliary filters. The simulation results using the measured impulse responses demonstrate the efficacy of the proposed algorithm for broadband noise control.
Publisher: Elsevier BV
Date: 03-2018
Publisher: Springer International Publishing
Date: 20-12-2020
Publisher: Elsevier BV
Date: 03-2023
No related grants have been discovered for Somanath Pradhan.