Acoustical Design for Open-Plan Offices
An extensive but very readable report published by Canada's National Research Council following a four-year study. 

Acoustical Design of Open-Plan Offices
A Nordic academic study of staff productivity in five open-plan offices pre- and post-comprehensive acoustic treatment

Open Plan Acoustics: Sound Decisions
A jargon-busting overview of open plan acoustics considerations for facility executives and other facility personnel. 

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