Just noticeable difference of ISO 3382-3 metrics for open-plan office noise

초록

In this study, the sound environment characteristics of open-plan office (OPO) were investigated, and design criteria with the single number quantity (Lp,A,S,4m) specified in ISO 3382-3 wassuggested. In addition, a design guideline that can improve work performance from the perspective of audio-visual privacy has been proposed. Two real office spaces were measured and modeled by computer simulation, and auditory evaluation was performed on 29 subjects for the stimulus generated based on Lp,A,S,4m. A new design grade criterion was proposed based on responses to speech privacy, annoyance, and willing to work. Next, the evaluation environment for audio-visual stimulation was implemented using virtual reality technology for four office spaces. For 25 subjects, work performance was quantified through a digit-span test, and various semantic attributes and audio-visual preferences (privacy, satisfaction, willing to work) were evaluated. As a result, it was found that audio-visual privacy complemented each other and contributed differently to work performance. It is believed that the results of this study can be used as basic data for the design of the optimal OPO sound environment.