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The Resource Active minimization of acoustic energy density to attenuate radiated noise from a diesel generator, by Andrew Johnson Boone

Active minimization of acoustic energy density to attenuate radiated noise from a diesel generator, by Andrew Johnson Boone

Label
Active minimization of acoustic energy density to attenuate radiated noise from a diesel generator
Title
Active minimization of acoustic energy density to attenuate radiated noise from a diesel generator
Statement of responsibility
by Andrew Johnson Boone
Creator
Subject
Genre
Language
eng
Summary
  • The focus of this thesis was to use active noise control (ANC) to globally minimize the tonal and broadband noise radiating from a diesel generator enclosure. The major goal of this research was to show that minimizing the noise within the enclosure can lead to an overall sound pressure level (SPL) reduction of radiated noise. The target levels for overall SPL reduction were at least 2 dBA
  • The control algorithms used in this research were based on a filtered-x LMS adaptive algorithm, which minimizes energy density (ED). Both feedforward and feedback control approaches were investigated
  • The noise spectrum produced by the diesel generator enclosure includes tonal and broadband components. The target range for control was from 0 to 300 Hz. Tonal frequencies at exterior locations were often reduced by 20 to 30 dB using feedforward control. With feedback control, tones were reduced 5 to 10 dB. Broadband control results were obtained at an exterior location using a feedforward control configuration. This control was achieved for frequencies between 100 and 600 Hz and levels were reduced by up to 5 dB. Some broadband control was achieved using feedback control, but this was limited to regions at the error sensor
  • An overall SPL reduction of 1.9 dBA outside the enclosure was achieved near the power terminal side of the enclosure. This was accomplished using tonal and broadband feedforward control. Experimental results show that control source placement, as well as error and reference sensor location, is key to global noise reduction
Cataloging source
UPB
Degree
M.S.
Dissertation year
2006
Granting institution
Brigham Young University. Dept. of Mechanical Engineering
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • bibliography
  • theses
Label
Active minimization of acoustic energy density to attenuate radiated noise from a diesel generator, by Andrew Johnson Boone
Link
http://hdl.lib.byu.edu/1877/etd1595
Instantiates
Publication
Bibliography note
Includes bibliographical references (p. 81-83)
Carrier category
volume
Carrier MARC source
rdacarrier
Content category
text
Content type MARC source
rdacontent
Dimensions
28 cm.
Extent
xx, 121 p.
Media category
unmediated
Media MARC source
rdamedia
Other physical details
ill. (some col.)
System control number
  • UtOrBLW
  • (OCoLC)ocn373821675
Label
Active minimization of acoustic energy density to attenuate radiated noise from a diesel generator, by Andrew Johnson Boone
Link
http://hdl.lib.byu.edu/1877/etd1595
Publication
Bibliography note
Includes bibliographical references (p. 81-83)
Carrier category
volume
Carrier MARC source
rdacarrier
Content category
text
Content type MARC source
rdacontent
Dimensions
28 cm.
Extent
xx, 121 p.
Media category
unmediated
Media MARC source
rdamedia
Other physical details
ill. (some col.)
System control number
  • UtOrBLW
  • (OCoLC)ocn373821675

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