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Global feedforward active noise control in vibro-acoustic cavities without increasing structural vibrations.

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Title: Global feedforward active noise control in vibro-acoustic cavities without increasing structural vibrations.
Authors: Puri, Amrita1, Modak, S. V.1 svmodak@mech.iitd.ac.in, Gupta, K.1
Source: Journal of the Acoustical Society of America. Dec2018, Vol. 144 Issue 6, p3391-3408. 18p.
Subjects: Noise, Architectural acoustics, Noise control, Cavitation noise, Kinetic energy, Sound, Structural acoustics
Abstract: Interior noise in vibro-acoustic cavities may be generated due to acoustic and structural disturbances. Earlier studies have shown that for global control, the maximum reduction in acoustic potential energy can be realised by using an optimum combination of acoustic and structural actuators. However, it is observed that this reduction in interior noise may also be accompanied with an increase in kinetic energy of the cavity structure. This paper presents the development of a feedforward technique for active noise control in vibro-acoustic cavities ensuring that the noise reduction does not lead to an increase in kinetic energy. The problem is formulated as a constrained minimisation problem to minimise the acoustic potential energy subject to a constraint that the kinetic energy does not increase. Through a numerical study, it is shown that the optimum solution of the above problem indeed is favourable in terms of reduction in acoustic potential energy in the cavity and kinetic energy of the structure. The paper further proposes a method for solution of this constrained minimisation problem using a penalty function method and solution of sequential unconstrained problems. The proposed method is validated through a numerical study on a car-like cavity for single- and multi-tonal noise. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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  Data: Global feedforward active noise control in vibro-acoustic cavities without increasing structural vibrations.
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  Data: <searchLink fieldCode="AR" term="%22Puri%2C+Amrita%22">Puri, Amrita</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Modak%2C+S%2E+V%2E%22">Modak, S. V.</searchLink><relatesTo>1</relatesTo><i> svmodak@mech.iitd.ac.in</i><br /><searchLink fieldCode="AR" term="%22Gupta%2C+K%2E%22">Gupta, K.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+Acoustical+Society+of+America%22">Journal of the Acoustical Society of America</searchLink>. Dec2018, Vol. 144 Issue 6, p3391-3408. 18p.
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  Data: <searchLink fieldCode="DE" term="%22Noise%22">Noise</searchLink><br /><searchLink fieldCode="DE" term="%22Architectural+acoustics%22">Architectural acoustics</searchLink><br /><searchLink fieldCode="DE" term="%22Noise+control%22">Noise control</searchLink><br /><searchLink fieldCode="DE" term="%22Cavitation+noise%22">Cavitation noise</searchLink><br /><searchLink fieldCode="DE" term="%22Kinetic+energy%22">Kinetic energy</searchLink><br /><searchLink fieldCode="DE" term="%22Sound%22">Sound</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+acoustics%22">Structural acoustics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Interior noise in vibro-acoustic cavities may be generated due to acoustic and structural disturbances. Earlier studies have shown that for global control, the maximum reduction in acoustic potential energy can be realised by using an optimum combination of acoustic and structural actuators. However, it is observed that this reduction in interior noise may also be accompanied with an increase in kinetic energy of the cavity structure. This paper presents the development of a feedforward technique for active noise control in vibro-acoustic cavities ensuring that the noise reduction does not lead to an increase in kinetic energy. The problem is formulated as a constrained minimisation problem to minimise the acoustic potential energy subject to a constraint that the kinetic energy does not increase. Through a numerical study, it is shown that the optimum solution of the above problem indeed is favourable in terms of reduction in acoustic potential energy in the cavity and kinetic energy of the structure. The paper further proposes a method for solution of this constrained minimisation problem using a penalty function method and solution of sequential unconstrained problems. The proposed method is validated through a numerical study on a car-like cavity for single- and multi-tonal noise. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1121/1.5082297
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 18
        StartPage: 3391
    Subjects:
      – SubjectFull: Noise
        Type: general
      – SubjectFull: Architectural acoustics
        Type: general
      – SubjectFull: Noise control
        Type: general
      – SubjectFull: Cavitation noise
        Type: general
      – SubjectFull: Kinetic energy
        Type: general
      – SubjectFull: Sound
        Type: general
      – SubjectFull: Structural acoustics
        Type: general
    Titles:
      – TitleFull: Global feedforward active noise control in vibro-acoustic cavities without increasing structural vibrations.
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            NameFull: Puri, Amrita
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            NameFull: Modak, S. V.
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            NameFull: Gupta, K.
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          Dates:
            – D: 01
              M: 12
              Text: Dec2018
              Type: published
              Y: 2018
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              Value: 144
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              Value: 6
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            – TitleFull: Journal of the Acoustical Society of America
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