Speech privacy unmasked

Abstract

Background masking noise is widely used to achieve speech privacy between work stations in open offices and in nearby closed (executive) offices. Although speech privacy is often essential, high masking noise levels reduce the abilities of some workers to perform speaking and listening tasks effectively and without strain. Masking noise levels are usually set as high as office inhabitants will tolerate, typically about 45–48 dB (A-weighted). This is 10 to 20 dB higher than noise levels in typical home settings. Many who can communicate effectively in home settings are impaired in offices with background masking noise. People adversely impacted include those with mild or worse hearing disabilities of hearing, speech, and language. Many are older workers and non-native speakers. The current architectural trend to greater inclusiveness underscores the desirability of lower background masking noise levels. Designers can usually achieve speech privacy with lower masking noise levels by specifying partitions with higher noise isolation ratings. Higher sound isolation ratings cost more than higher masking noise levels. But higher costs may be balanced by the benefits of a more inclusive and humane workspace.