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Development of Adaptive Acoustic Impedance Control Technologies of Acoustic Duct Liner
Joint Authors
Kobayashi, Hiroshi
Ozaki, Schunichi
Yokochi, Makoto
Source
Advances in Acoustics and Vibration
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-09-20
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
This paper describes the development of adaptive acoustic impedance control (AAC) technologies to achieve a larger fan noise reduction, by adaptively adjusting reactance and resistance of the acoustic liner impedance.
For the actual proof of the AAC technology III performance, the advanced fan noise absorption control duct liner II was made on trial basis, with the simple control system and the plain device.
And, then, the duct liner II was examined for the AAC technology I, II, and III models, using the high speed fan test facility.
The test results made clear that the duct liner II of the AAC technology III model could achieve the fan noise reduction higher than O.A.
SPL 10 dB (A) at the maximum fan speed 6000 rpm, containing the reduction of fundamental BPF tone of 18 dB and 2nd BPF tone of 10 dB in response to the fan peed change from 3000 to 6000 rpm.
American Psychological Association (APA)
Kobayashi, Hiroshi& Ozaki, Schunichi& Yokochi, Makoto. 2011. Development of Adaptive Acoustic Impedance Control Technologies of Acoustic Duct Liner. Advances in Acoustics and Vibration،Vol. 2011, no. 2011, pp.1-14.
https://search.emarefa.net/detail/BIM-474313
Modern Language Association (MLA)
Kobayashi, Hiroshi…[et al.]. Development of Adaptive Acoustic Impedance Control Technologies of Acoustic Duct Liner. Advances in Acoustics and Vibration No. 2011 (2011), pp.1-14.
https://search.emarefa.net/detail/BIM-474313
American Medical Association (AMA)
Kobayashi, Hiroshi& Ozaki, Schunichi& Yokochi, Makoto. Development of Adaptive Acoustic Impedance Control Technologies of Acoustic Duct Liner. Advances in Acoustics and Vibration. 2011. Vol. 2011, no. 2011, pp.1-14.
https://search.emarefa.net/detail/BIM-474313
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-474313