Jack Harvie-Clark Acoustic challenges and solutions for dwellings - - PowerPoint PPT Presentation
Jack Harvie-Clark Acoustic challenges and solutions for dwellings DESIGN. DELIVER.PERFORM. www.cibse.org/Build2PerformLive Whats the problem? 7 m people seriously annoyed 4.2 m exposed to dangerous noise levels at night 2 nd highest
Acoustic challenges and solutions for dwellings
www.cibse.org/Build2PerformLive
7 m people “seriously annoyed” 4.2 m exposed to dangerous noise levels at night 2nd highest environmental burden of disease
Using planning conditions to improve indoor environmental quality IEQ in new residential developments N Conlan, J Harvie-Clark, Apex Acoustics Ltd. Proc. IOA Vol. 40. Pt. 1. 2018 85 % of planning applications assumed: Windows open - for overheating assessment Windows closed - for noise assessment
Duration for mitigating overheating Internal noise level
No adverse effect
Lowest observable
5 10 15 20 25 30 35
Level difference from outside to inside (dB)
Standard windows Attenuated windows Balconies Attenuated vents
www.apexacoustics.co.uk/open-windows-good-sound-insulation/
Tackling Traffic Noise Through Plenum Windows – An Application in Hong Kong, M Yeung et al, Internoise 2014, Melbourne, Australia
www.apexacoustics.co.uk/open-windows-good-sound-insulation/
Methods of controlling noise levels and overheating in residential buildings. N Conlan, J Harvie-Clark, 24th Int. Congress on Sound & Vibration, 2017, London
Case Study of Design for Noise Mitigation Measures for Public Housing Developments in Hong Kong, Sustainable Building 2013, Hong Kong Regional Conference
Level difference - 27 dB Free area - 0.4 m2
Level difference - 29 dB Free area - 0.25 m2
Level difference ~ 37 dB Free area - 0.12 m2 Fan boost – 90 ltrs/sec Image courtesy of TEK Ltd
Fan boost – 94 ltrs/sec Level difference - 24 dB Images courtesy of TEK Ltd
Success: sustainable, resilient, comfortable Need for early concept Regulatory driver is coming! Failure: mech cooling / uncomfortable Thermal performance Occupant experience Developer response
Occupants should not be forced to choose between thermal discomfort and adverse health impacts from noise
www.cibse.org/Build2PerformLive
www.apexacoustics.co.uk/noise-ventilation-and-overheating-in-dwellings …/attenuated-passive-ventilation-options