ISO 3382-3: NECESSARY BUT NOT SUFFICIENT A NEW APPROACH TO ACOUSTIC DESIGN FOR ACTIVITY-BASED-WORKING OFFICES

摘要

Since the room acoustic parameters in ISO 3382-3 were published, there have been various international attempts to classify offices achieving different values. However, recent summaries of acoustic satisfaction demonstrate little correlation with the room acoustic parameters that may drive the design. While the parameters of ISO 3382-3 are essential to understand how the room responds to sound, they are of limited use in helping designers to understand how people respond to their office environment. A new approach - proposed for inclusion within ISO/WD 22955 - assesses acoustic conditions within activity-based working (ABW) offices, or between different use types generally. The Liveliness term can be used to characterise suitable acoustic environments for different types of activities; background sound levels can also be attributed, by measurement or design. A matrix of signal-to-noise ratios can be derived for a particular office, to account for source level vibrancy and receiver sensitivity. This enables a design framework for the in-situ attenuation of speech between workstations, D_(n, A, s). From the in-situ attenuation requirement, the ABW layout design can be developed accordingly. This method can identify potential for conflicts between different types of use or activity where there is insufficient attenuation between them, to inform the workspace designer where enhanced in-situ attenuation can improve the acoustic conditions for occupants.