Abstract
The effectiveness of a barrier in open office planning is evaluated in terms of the total system of surrounding surfaces. Scale-modeling techniques utilizing an ultrasonic source have been used to determine the loss in sound isolation provided by a barrier between two adjacent spaces when reflective but potentially absorptive surfaces such as corewalls, ceiling lighting fixtures, and other barriers are in the proximity of the barrier. The importance of the orientation of source and barrier with respect to ceiling lighting systems is analyzed along with the importance of ceiling-tile absorption. The use of reflective panels to enhance isolation is discussed. Barrier effectiveness is also evaluated in terms of speech privacy and intelligibility criteria for a general case.
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