Acoustics of long spaces: theory and design guidance
Long spaces, such as railway stations, urban streets, road tunnels and transition spaces within buildings, present acute acoustical problems. Acoustics experts recognise a need for better understanding of the behaviour of sound in such spaces, particularly the safety implications for public spaces, as classic acoustical theory is often not applicable due to the extreme dimensions involved.
Dr. Kang is acknowledged as an authority in the research of these problems, and in this book he addresses the need for accurate prediction models and calculation formulae, and provides practical design guidelines drawn from case study materials. Acoustics of long spaces will be a valuable tool for the designer, engineer, urban planner and environmental consultant.
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Basic acoustic theories and modelling techniques
Acoustic theories of long spaces
design guidance for long enclosures
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absorption coefficient Acoustical Society Acustica air absorption ANSI architectural acoustic arrangement A2 Arrangements given articulation scores Arup Acoustics attenuation caused boundary absorption calculation Cantonese ceiling comparison considered corridor decay curves decrease diffusely and geometrically diffusely reflecting boundaries direct sound effect equation extra attenuation extra SPL attenuation facade frequency full scale geometrically reflecting boundaries given in Figure image source method Kang Kwai Fong station length long spaces Mandarin membrane absorbers model train section multiple loudspeakers multiple sources PB words point source radiosity ray tracing receiver rectangular long enclosure reverberation ribbed diffusers room acoustics RT30 and EDT scale model Schroeder diffusers seen sentence intelligibility shown in Figure side walls simulation single source Society of America sound attenuation sound distribution sound energy sound energy density sound field source-receiver distance speech intelligibility SPL distribution STI from multiple street canyon street height street width train noise typical underground stations urban streets