Multiple activities in open offices lead to multiple sound sources that can negatively affect users. In response, an approach has been developed that considers objective parameters, subjective perception, and architectural solutions. However, common practice reveals interferences between these areas, causing poor acoustic design. This paper aims to identify these interferences by analyzing a real case. Objective parameters (STI, RT, and LAeq,T) were measured and evaluated according to EN ISO 3382-3 and BS ISO 22955. A synthesized GABO questionnaire was distributed to identify the most annoying sound sources. The results show that compliant STI and RT do not lead to low annoyance levels from understandable and unintelligible speech. Compliant noise levels are still perceived as annoying for all activities. Additionally, the position of functions can affect how sources are perceived differently.This highlights the need for multi-criteria analysis to analyze and overcome these interferences and ensure high acoustic comfort.
Giglio et al. (2025) studied this question.