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Noise control strategies for naturally ventilated buildings

David Oldham (University of Liverpool, UK )

This lecture is concerned with techniques to reduce noise ingress into naturally ventilated buildings while minimizing airflow path resistance. A combined experimental and theoretical approach to the interaction of airflow and sound transmission through ventilators for natural ventilation applications is described. It is demonstrated that a combination of sound reduction mechanisms – one covering low frequency sound and another covering high frequency sound – is required to attenuate effectively noise from typical urban sources. A method is proposed for quantifying the acoustic performance of different strategies to enable comparisons and informed decisions to be made leading to the possibility of a design methodology for optimizing the ventilation and acoustic performance of different strategies.