@article{Ibbotson_Cambridge_Pearse_2008, title={An investigation into wind generated aero-acoustic tones}, volume={36}, url={https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2033}, abstractNote={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.}, number={3}, journal={Canadian Acoustics}, author={Ibbotson, Peter Alexander and Cambridge, Jason and Pearse, John}, year={2008}, month={Sep.}, pages={52–53} }