Aeroacoustic Noise from Building Façades – Observed Problems and Approaches to Mitigation

Authors

  • Brad Andrew Pridham Novus Environmental

Abstract

As wind passes over and around a building there are aerodynamic interactions between the airflow and building features.  This includes local accelerations of flows, the generation of turbulence, and the potential formation of vortices in the wake of building features.  Under certain conditions this interaction can result in the generation of audible tones.  If the amplitude of the generated tone is sufficiently high, and its characteristics are distinctly different from the existing background noise level, disturbance to the building and its surrounding environment is possible.

Several phenomena are attributed to the generation of aerodynamic noise.  Many of these relate to physical conditions that are often exploited in musical acoustics to produce an efficient generation of sound by coupling airflow or vibration to a resonant object.  Whereas in musical acoustics the instruments are tuned to produce specific pitch and timbre, conditions of aerodynamic noise generated by buildings are generally unexpected, unwanted, and unmusical.  When these problems occur, they often become publicized due to noise complaints, and can lead to loss of revenues, costly remediation, and potential damage to the reputation of the building owner and designers.  As such, there is a desire to identify risk during the design of the building and take appropriate steps to mitigation of risk where noise generation is possible.

In this presentation we discuss the common sources of aeroacoustic resonances that occur on building façade features, some of the techniques used to establish risk of noise problems, and approaches to managing risk and mitigation measures.  Examples are presented from projects around the globe that include some of the world’s tallest buildings.  Numerical and experimental methods of assessment are reviewed and a general framework for assessment is presented.

Author Biography

Brad Andrew Pridham, Novus Environmental

Brad is a specialist in building acoustics, with a special interest in vibration control related to structural systems. He earned his Ph.D. in Structural (Civil) Engineering, with a focus on vibration analysis of structural systems. He has 15+ years of experience solving complex acosutics and vibration problems. Brad joined Novus’ Guelph office in 2010 as a Vibration Specialist and became Principal in 2015.  As the Technical Leader of the vibration group at Novus he is responsible for project management, business and technical development, assurance of delivery quality and consultation with clients.

Published

2017-08-25

How to Cite

1.
Pridham BA. Aeroacoustic Noise from Building Façades – Observed Problems and Approaches to Mitigation. Canadian Acoustics [Internet]. 2017 Aug. 25 [cited 2021 Oct. 25];45(3). Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3082

Issue

Section

Proceedings of the Acoustics Week in Canada