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. A new case study illustrates significant differences in acoustic satisfaction for people on two different floor plates within the same building; these have very different workplace design, but have almost identical parameters according to ISO 3382-3. A new approach - the Apex Method - is proposed to assess acoustic conditions within activity-based working (ABW) offices. 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 postulated, 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 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.