Special Issue "Active and Passive Noise Control"

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Acoustics and Vibrations".

Deadline for manuscript submissions: 31 October 2018

Special Issue Editors

Guest Editor
Prof. Woon Seng Gan

School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
Website | E-Mail
Guest Editor
Prof. Yoshinobu Kajikawa

Electrical and Electronic Engineering, Kansai University, Japan
Website | E-Mail

Special Issue Information

Dear Coleagues,

Active and Passive Noise control (ANPC) has been successfully applied to many commercial applications, such as the noise cancelling headsets used in airplane, hearing aids, noise control for head rests, vacuum cleaners, and noise-quietening car seats in automobiles; and also in bigger scale systems, such as, ventilation ducts, cooker hoods and data server racks, and free field noise control systems for the interior of propeller planes, trains, and luxury yachts, etc. In recent years, we are also witnessing growing research interest in controlling noise coming into the residential buildings through open windows. With the advancement of low-cost, fast-computation hardware, which can take on more complex multi-channel adaptive signal processing algorithms, and coupled with reliable sensors and actuators, we are expecting to see more innovative products that harness the power of ANPC to make quieter devices and machineries. However, there are still several research and development issues under investigation. In this special issue, we aim to solicit the latest research findings, new approaches and applications of ANPC to better mitigate acoustical noise in a more efficient manner and approach.

Prof. Woon Seng Gan
Prof. Yoshinobu Kajikawa
Guest Editors

Manuscript Submission Information

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Keywords

  • Active Noise Control Algorithms
  • Sensor and Actuator Placement
  • Virtual Sensing and Noise Control
  • Secondary Path Modeling
  • New Applications of Active and Passive Noise Control
  • Multiple Channels Active Noise Control System
  • Psychoacoustic Techniques Applied to Active Noise Control
  • Applying Machine Learning Techniques for Active Noise Control
  • Integration of Active Noise Control Subsystems
  • Hybrid Approach to Noise Mitigation
  • New techniques in Active Noise Control
  • Acoustical Modeling and Simulation
  • Commercial Applications or Industry Deployments
  • Experimentation Studies

Published Papers (5 papers)

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Research

Open AccessArticle Noise-Canceling Office Chair with Multiple Reference Microphones
Appl. Sci. 2018, 8(9), 1702; https://doi.org/10.3390/app8091702
Received: 31 August 2018 / Revised: 14 September 2018 / Accepted: 16 September 2018 / Published: 19 September 2018
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Abstract
Office employees are exposed to acoustic noise, especially in an open office environment. Passive or active headsets sufficiently reduce the level of noise, but their long-time wear is uncomfortable. The paper presents an active headrest system built into a chair. Feedforward control is
[...] Read more.
Office employees are exposed to acoustic noise, especially in an open office environment. Passive or active headsets sufficiently reduce the level of noise, but their long-time wear is uncomfortable. The paper presents an active headrest system built into a chair. Feedforward control is utilized with multiple reference microphones, and flexible gooseneck microphones serve as error sensors. The reference sensors surround the chair, allowing the suppression of sound waves arriving from any direction. The concept of multiple reference control has been tested by extensive experiments showing that multiple reference signals help to increase the suppression in normal rooms where reverberation occurs, even if only one noise source is present. The preliminary experiments are completed by a series of simulations aiming to explore the zones of quiet at the user’s ears. The paper introduces the construction details of the noise-canceling chair: The two loudspeakers are controlled by the signals of two error microphones and four reference signals. The controller is based on the normalized filtered error least mean squared algorithm, implemented on an Analog Devices ADSP-21262 signal processor-based hardware. Experimental results are reported that show the efficient suppression of tonal, as well as broadband disturbances. Full article
(This article belongs to the Special Issue Active and Passive Noise Control)
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Open AccessArticle A New Method for Active Cancellation of Engine Order Noise in a Passenger Car
Appl. Sci. 2018, 8(8), 1394; https://doi.org/10.3390/app8081394
Received: 8 June 2018 / Revised: 3 August 2018 / Accepted: 14 August 2018 / Published: 17 August 2018
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Abstract
This paper presents a novel active noise cancellation (ANC) method to reduce the engine noise inside the cabin of a car. During the last three decades, many methods have been developed for the active control of a quasi-stationary narrowband sinusoidal signal. However, since
[...] Read more.
This paper presents a novel active noise cancellation (ANC) method to reduce the engine noise inside the cabin of a car. During the last three decades, many methods have been developed for the active control of a quasi-stationary narrowband sinusoidal signal. However, since the interior noise signal is non-stationary with a fast frequency variation when the car accelerates rapidly, these methods cannot stably reduce the interior noise. The proposed method can reduce the interior noise stably even if the speed of the car is changed quickly. The method uses an adaptive filter with an optimal weight vector for the active control of such an engine noise. The method of determining the optimal weight vector of an adaptive filter is demonstrated. In order to validate the advantages of the proposed method, a conventional method and the proposed method are simulated with three synthesized signals. Finally, the proposed method is applied to the cancellation of booming noise in a sport utility vehicle. We demonstrate that the performance of the ANC system with the proposed algorithm is excellent for the attenuation of engine noise inside the cabin of a car. Full article
(This article belongs to the Special Issue Active and Passive Noise Control)
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Open AccessArticle Development and Evaluation of Light-Weight Active Noise Cancellation Earphones
Appl. Sci. 2018, 8(7), 1178; https://doi.org/10.3390/app8071178
Received: 26 May 2018 / Revised: 12 July 2018 / Accepted: 17 July 2018 / Published: 19 July 2018
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Abstract
This paper presents the development of active noise control (ANC) for light-weight earphones, and proposes using music or natural sound to estimate the critical secondary path model instead of extra random noise. Three types of light-weight ANC earphones including in-ear, earbud, and clip
[...] Read more.
This paper presents the development of active noise control (ANC) for light-weight earphones, and proposes using music or natural sound to estimate the critical secondary path model instead of extra random noise. Three types of light-weight ANC earphones including in-ear, earbud, and clip phones are developed. Real-time experiments are conducted to evaluate their performance using the built-in microphone inside KEMAR’s ear and to compare with commercially-available ANC headphones and earphones. Experimental results show that the developed light-weight ANC earphones achieve higher noise reduction than the commercial ANC headphones and earphones, and the in-ear ANC earphone has the best noise reduction performance. Full article
(This article belongs to the Special Issue Active and Passive Noise Control)
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Open AccessArticle Modified LMS Strategies Using Internal Model Control for Active Noise and Vibration Control Systems
Appl. Sci. 2018, 8(6), 1007; https://doi.org/10.3390/app8061007
Received: 26 April 2018 / Revised: 14 June 2018 / Accepted: 19 June 2018 / Published: 20 June 2018
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Abstract
Traditional adaptive filtering algorithms are non-recursive systems that cannot use a time-variant reference input in real time and are not appropriate for control signals with uncertainties and unanticipated conditions. The main purpose of this research is to design novel adaptive digital filtering algorithms
[...] Read more.
Traditional adaptive filtering algorithms are non-recursive systems that cannot use a time-variant reference input in real time and are not appropriate for control signals with uncertainties and unanticipated conditions. The main purpose of this research is to design novel adaptive digital filtering algorithms based on internal model control (IMC). The new methods consist of a process model for the target plant so as to estimate its dynamic behavior for active vibration and noise attenuation schemes in order to improve the stability, robustness, and tracking performance. On the basis of on the existing least mean squares, the methods are combined with an internal model controller, or the whole adaptive filtering system could become a feedback control system structure based on IMC. The performances were validated in numerical simulations with various conditions that could have happened in realistic applications, and the results were compared with the original algorithms. This study shows that the active noise and vibration systems that are applied to vehicles, mechanical systems, and other targets are enhanced through improving the performance of conventional adaptive filtering algorithms and by using internal model control effectively. Full article
(This article belongs to the Special Issue Active and Passive Noise Control)
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Open AccessArticle Acoustic Improvement of Stator–Rotor Interaction with Nonuniform Trailing Edge Blowing
Appl. Sci. 2018, 8(6), 994; https://doi.org/10.3390/app8060994
Received: 16 May 2018 / Revised: 4 June 2018 / Accepted: 16 June 2018 / Published: 19 June 2018
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Abstract
The results of unsteady-flow simulations and experiments are discussed to investigate active noise-reduction effects on the stator–rotor interaction in a single-stage low-speed compressor with nonuniform trailing edge blowing. It is found that for the investigated type of stator–rotor interaction noise, nonuniform trailing edge
[...] Read more.
The results of unsteady-flow simulations and experiments are discussed to investigate active noise-reduction effects on the stator–rotor interaction in a single-stage low-speed compressor with nonuniform trailing edge blowing. It is found that for the investigated type of stator–rotor interaction noise, nonuniform trailing edge blowing has beneficial noise-reducing effects. The overall aim is to demonstrate that nonuniform trailing edge blowing can compensate momentum loss and reduce the axial thrust on rotor blades. The results illustrate how nonuniform trailing edge blowing influences the sound pressure level of the blade-passing frequencies and results in active noise reduction effects. The study was conducted using a trailing edge blowing system, a four-hole dynamic flow-field measurement system, and phase lock technology. The results obtained show that nonuniform trailing edge blowing leads to substantial noise-reduction effects, lowering sound levels by more than 10 dB with about 5‰ of inlet mass flow. Full article
(This article belongs to the Special Issue Active and Passive Noise Control)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

The type of paper: Article
Tentative title: Development and Evaluation of Light-weight Active Noise Cancellation Earphones
Author: Cheng-Yuan Chang(張政元)
Affiliation:
Professor, EE Dept., Chung Yuan Christian University, Jhongli 320, Taiwan
Abstract:This paper presents the development of active noise control (ANC) for light-weight earphones, and proposes using music or natural sound to estimate the critical secondary path model instead of extra random noise. Three types of light-weight ANC earphones including in-ear, earbud, and clip phones are developed. Real-time experiments are conducted to evaluate their performance using the built-in microphone inside KEMAR’s ear and compare with commercial-available ANC headphones and earphone. Experimental results show the developed light-weight ANC earphones achieve higher noise reduction than the commercial ANC headphones and earphone, and the in-ear ANC earphone has the best noise reduction performance.

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