컴퓨터 시뮬레이션과 설문조사를 활용한 개방형 사무실의 음향설계요소 도출 및 평가

Abstract

It is commonly believed that open-plan offices promote teamwork and communication, making it the most commonly used layout. Recent studies have reported various negative influences of open-plan office layouts on speech privacy, occupant health, job satisfaction, and performance. However, these studies have tended to ignore the potential impact of noise itself on psychological well-being and health. Furthermore, no attempt has been made to investigate the influence of speech privacy on psychological well-being and health in open-plan offices. In terms of architectural acoustic design, several studies have dealt with the design of open-plan offices in relation to speech privacy. A mathematical model of sound propagation between workspaces was used to investigate the influence of various design parameters on speech privacy in open-plan offices. However, studies of laboratory and mathematical models are limited because the fail to consider sound field characteristics of the entire office space, so studies using computer simulations are being conducted. This study demonstrates the measurement of speech privacy using both the ISO 3382-3 standard and the STI in five offices of general shape. Furthermore, each office was evaluated by applying the acoustics classification scheme suggested by Virjonen. And this study investigated impact of psychoacoustic of office acoustic and improving method of office acoustics through architectural elements. The first, we examine office acoustic performance in the five open-plan offices studied. These physically diverse offices were evaluated using Virjonen’s acoustic classification scheme. The ratings for most of the offices studied indicated that all of D2,S was D and Lp,A,S,4m was A-C. Moreover, rD received a low rating, B-D. The second, we include responses of occupants of open-plan offices that were surveyed. Particularly, the first questionnaire surveys presents psychosocial effects of their noise with two different domestic open-plan offices. The second questionnaire surveys - Impact of Noise on Self-rated Job Satisfaction and Health in Open-plan offices. Self-rated job satisfaction of workers in open-plan offices was negatively affected by speech privacy and duration of disturbing noise. The third, this study contains an evaluation of office acoustics considering differences in finishing materials, ceiling heights, office width and depth, etc. using computer simulations. For this evaluation, three types of representative open-plan offices were selected. As a result of this evaluation, we concluded that the absorption coefficient and shape of finishing materials at each location affect office acoustics. Furthermore, various office widths were considered to investigate the changes induced by different dimensions at each location. Moreover, various architectural elements and the consequential complex acoustic performance changes caused by them were examined. These findings provide useful method to improve the performance of acoustics in open plan offices.