Investigation of Flanking Noise Transmission into a Reverberation Room

Authors

  • Omar Sadek University of Ontario Institute of Technology
  • Nadim Arafa University of Ontario Institute of Technology
  • Atef Mohany University of Ontario Institute of Technology

Abstract

Testing facilities such as reverberation rooms or anechoic chambers are prone to flanking noise transmission problems. In this work, detailed characterisation of flanking noise transmission into an industrial reverberation room is presented. Combination of acoustic mapping technique and structural vibrations measurements were performed in order to detect the cause of flanking noise transmission. The industrial reverberation room under consideration is located within a manufacturing facility hence, the measurements were performed in two scenarios; namely, when the facility was operating and when the facility was not operating. One-third octave analysis show that some of the low frequency bands are leaking into the reverberation room. It is revealed that the flanking noise is emanating from structural vibrations. Several countermeasures to reduce the flanking noise issue were investigated. Field measurements are performed after the developed mitigation technique is implemented and the results show that the flanking noise transmission into the reverberation room is significantly reduced in the targeted frequency bands.

Author Biographies

Omar Sadek, University of Ontario Institute of Technology

PhD StudentUniversity of Ontario Institute of Technology

Nadim Arafa, University of Ontario Institute of Technology

Postdoctoral FellowAeroAcoustics and Noise Control LaboratoryUniversity of Ontario Institute of Technology

Atef Mohany, University of Ontario Institute of Technology

Chair and Associate ProfessorDepartment of Automotive, Mechanical, and Manufacturing EngineeringFaculty of Engineering and Applied ScienceUniversity of Ontario Institute of Technology

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Published

2017-08-19

How to Cite

1.
Sadek O, Arafa N, Mohany A. Investigation of Flanking Noise Transmission into a Reverberation Room. Canadian Acoustics [Internet]. 2017 Aug. 19 [cited 2021 Oct. 20];45(3):40-1. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3087

Issue

Section

Proceedings of the Acoustics Week in Canada