Investigation of dash-8 run-up noise characteristics for local active noise control

Authors

  • Ann Nakashima Dept. of Mechanical Engineering, Sch. of Occup. Environ. Hygiene, The Univ. of British Columbia, 3rd Floor, 2206 East Mall, Vancouver, BC V6T 1Z3, Canada
  • Murray Hodgson Dept. of Mechanical Engineering, Sch. of Occup. Environ. Hygiene, The Univ. of British Columbia, 3rd Floor, 2206 East Mall, Vancouver, BC V6T 1Z3, Canada

Keywords:

Acoustic noise, Attenuation, Harmonic analysis, Microphones, Spectrum analysis, Active noise control, Blade-passing frequencies, Noise directivity patterns

Abstract

The measured narrow-band and 1/3 octave band spectra were calculated and analyzed in order to determine the blade-passing frequencies (BPF) and noise directivities for three different engine settings. Thus decibel subtraction of the idling engine spectra from the 50% engine power spectra was performed to estimate the power spectra of a single engine. The results were compared to determine if and how an ANC system must be changed to obtain the best noise attenuation for the different run-up conditions.

Additional Files

Published

2003-09-01

How to Cite

1.
Nakashima A, Hodgson M. Investigation of dash-8 run-up noise characteristics for local active noise control. Canadian Acoustics [Internet]. 2003 Sep. 1 [cited 2025 Feb. 13];31(3):70-1. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1554

Issue

Vol. 31 No. 3 (2003)

Section

Proceedings of the Acoustics Week in Canada

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