TY - JOUR AU - Ibbotson, Peter Alexander AU - Cambridge, Jason AU - Pearse, John PY - 2008/09/01 Y2 - 2024/03/28 TI - An investigation into wind generated aero-acoustic tones JF - Canadian Acoustics JA - Canadian Acoustics VL - 36 IS - 3 SE - Proceedings of the Acoustics Week in Canada DO - UR - https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2033 SP - 52-53 AB - 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. ER -