An investigation into wind generated aero-acoustic tones

Authors

  • Peter Alexander Ibbotson Marshall Day Acoustics, Christchurch, New Zealand
  • Jason Cambridge School of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand
  • John Pearse School of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand

Keywords:

Acoustics, Fast Fourier transforms, Fourier transforms, Hospitals, Natural frequencies, Parking, Subsonic flow, Acoustic tones, Bending, External-, Forced vibration responses, Fundamental modes, Measuring, Narrow bands, New zealand, Parking buildings, Private hospitals, Tonal noises

Abstract

A study was conducted to investigate wind generated aero-acoustic tones in a private hospital in Christchurch, New Zealand. The investigation was conducted at a newly constructed six level car parking building at the hospital, due to a complaint regarding tonal noise audible during windy conditions. Researchers performed tests during windy conditions, using fast Fourier Transform (FFT) analysis, to allow a narrow band assessment of the tone to be performed. A forced vibration response of the balusters was measured by exciting the fundamental mode natural frequency with a hammer and measuring the response with an accelerometer. The results show that the external balusters have a natural frequency response at 1550 and 2753Hz in bending.

Published

2008-09-01

How to Cite

1.
Ibbotson PA, Cambridge J, Pearse J. An investigation into wind generated aero-acoustic tones. Canadian Acoustics [Internet]. 2008Sep.1 [cited 2021May16];36(3):52-3. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2033

Issue

Vol. 36 No. 3 (2008)

Section

Proceedings of the Acoustics Week in Canada

Copyright on articles is held by the author(s). The corresponding author has the right to grant on behalf of all authors and does grant on behalf of all authors, a worldwide exclusive licence (or non-exclusive license for government employees) to the Publishers and its licensees in perpetuity, in all forms, formats and media (whether known now or created in the future)
i)    to publish, reproduce, distribute, display and store the Contribution;
ii)    to translate the Contribution into other languages, create adaptations, reprints, include within collections and create summaries, extracts and/or, abstracts of the Contribution;
iii)    to exploit all subsidiary rights in the Contribution,
iv)    to provide the inclusion of electronic links from the Contribution to third party material where-ever it may be located;
v)    to licence any third party to do any or all of the above.

Most read articles by the same author(s)