Active noise reduction of blade-passing frequency tone radiated from a centrifugal blower

Yutaka Ohta, Takashi Goto, Eisuke Outa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The blade-passing frequency noise, abbreviated to BPF noise, radiated from a centrifugal blower, exhibits an extremely high level in the power spectrum of blower-radiated noise and dominates the overall noise level. In the present research, therefore, attention is focused on the BPF noise and two kinds of active control methods are applied to reduce the BPF noise level. One is an active noise source cancellation method and the other is an active noise reduction in the transmission passage. The assumed extent of the BPF noise source is replaced by flat plates which are driven by piezoelectric actuators, and the noise level of BPF can be reduced effectively without any influence on the other frequency components. In the noise reduction in the transmission passage, a small-sized loud speaker is used as a secondary source. The noise level of BPF can be reduced remarkably even in the highrotation region, as usually expected.

Original languageEnglish
Title of host publicationInstitute of Noise Control Engineering of the USA - 35th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2006
Pages2509-2518
Number of pages10
Publication statusPublished - 2006 Dec 1
Event35th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2006 - Honolulu, HI, United States
Duration: 2006 Dec 32006 Dec 6

Publication series

NameInstitute of Noise Control Engineering of the USA - 35th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2006
Volume4

Conference

Conference35th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2006
CountryUnited States
CityHonolulu, HI
Period06/12/306/12/6

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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    Ohta, Y., Goto, T., & Outa, E. (2006). Active noise reduction of blade-passing frequency tone radiated from a centrifugal blower. In Institute of Noise Control Engineering of the USA - 35th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2006 (pp. 2509-2518). (Institute of Noise Control Engineering of the USA - 35th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2006; Vol. 4).