Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Effects of Suspended Hemispherical Acoustic Absorbers on Speech Privacy in Open Plan Offices

반구형 천장 흡음재 형상 및 흡음률 변화에 따른 오픈 플랜 오피스의 스피치 프라이버시 영향

  • Kim, Geon-Hee (Dept. of Architectural Engineering, Chungnam University) ;
  • Moon, Wan-Ki (Dept. of Architectural Engineering, Chungnam University) ;
  • An, Su-Kyeong (Dept. of Architectural Engineering, Chungnam University) ;
  • Jang, Seo-Jin (Dept. of Architectural Engineering, Chungnam University) ;
  • Hong, Joo-Young (Dept. of Architectural Engineering, Chungnam University)
  • Received : 2023.07.07
  • Accepted : 2023.09.20
  • Published : 2023.10.30
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Abstract

Recently, open plan office design has been increasingly adopted to improve communication and productivity of employees. However, some studies revealed that they can harm user satisfaction and speech privacy. Therefore, this study aims to utilize the ceiling-type hemispherical sound absorption system to enhance speech privacy in open plan offices by finding the optimal acoustic form. As design factors, the radius and absorption coefficients of the hemispherical acoustic absorbers were manipulated. The independent variable was modeled in nine cases by varying the radius (0.50 m, 0.75 m, 1.00 m) and sound absorption coefficients (0.10, 0.45, 0.80) of the hemispherical acoustic absorbers. Acoustic simulation was conducted to assess the effects of radius and sound absorption on speech privacy indicators (rP, rD, LpAS4m) for open plan offices. The results indicate that higher values of radius and absorption generally result in increased speech privacy for rD and rP. Specifically, there was a difference of 3.08 m for maximum rD and 7.40 m for rP. Regarding the enhancement of speech privacy, it was found that the radius of the absorber had a greater impact on speech privacy than sound absorption. Based on the results, the best speech privacy can be achieved when the radius was 1.00 m and the absorption coefficient was 0.80.

Keywords

Acknowledgement

이 연구는 2023년도 충남대학교 학술연구비에 의해 지원되었음. 과제번호:2023-0696-01

References

  1. Brennan, A., Chugh, J. S., & Kline, T. (2002). Traditional versus open office design: A longitudinal field study. Environment and Behavior, 34(3), 279-299. https://doi.org/10.1177/0013916502034003001
  2. Hedge, A. (1982). The open-plan office: A systematic investigation of employee reactions to their work environment. Environment and Behavior, 14, 519-542. https://doi.org/10.1177/0013916582145002
  3. International Electrotechnical Commission. (2020). Sound system equipment-Part 16: Objective rating of speech intelligibility by speech transmission index, IEC 60268-16 Ed. 5.0.
  4. International Organization for Standardization. (2012). Acoustics - Measurement of room acoustic parameters - Part 3: Open plan offices (ISO/DIS Standard No. 3382-3). Retrieved from https://www.iso.org/standard/46520
  5. Jang, H. S., Kim, J. H., & Jeon, J. Y. (2014). Evaluation of speech privacy on the seat-design in high-speed train passenger cars. Transactions of the Korean Society for Noise and Vibration Engineering, 24(2), 146-153. https://doi.org/10.5050/KSNVE.2013.24.2.146
  6. Jeong, J. (2023). Comparison of acoustics performance measurement and evaluation standard of office space and office acoustics criteria of European countries. The Journal of the Acoustical Society of Korea, 42(2), 133-142. https://doi.org/10.7776/ASK.2023.42.2.133
  7. Jeong, J.H., & Lee, S.C. (2018). Comparison of sound pressure level and speech intelligibility of emergency broadcasting system at longitudinal corridor. Fire Science and Engineering, 32(4), 49-49. https://doi.org/10.7731/KIFSE.2018.32.4.042
  8. Jo, H. I., Santika, B. B., Lee, H. R., & Jeon, J. Y. (2022). Classification of sound environment based on subjective response with speech privacy in open plan offices. Applied Acoustics, 189, 108595.
  9. Kaarlela-Tuomaala A, Helenius R, Keskinen E, & Hongisto V. (2009). Effects of acoustic environment on work in private office rooms and open-plan offices - longitudinal study during relocation. Ergonomics., 52(11), 1423-44. https://doi.org/10.1080/00140130903154579
  10. Kang, S., Mak, C. M., Ou, D., & Zhou, X. (2023). Effects of speech intelligibility and reverberation time on the serial recall task in Chinese open-plan offices : A laboratory study. Applied Acoustics, 208, 109378.
  11. Karlen, M., & Benya, J. R. (2004). Lighting design basics, John Wiley & Sons., 13-23.
  12. Kwon, M., & Yang, W. (2023). Effects of face masks and acoustical environments on speech recognition by preschool children in an auralised classroom. Applied Acoustics, 202, 109149.
  13. Lee, S., Kim, J., Kim, S., Song, H., & Ryu, J. (2023). An online survey on self-reported workplace design and personal factors concerning speech privacy satisfaction in open-plan office environment. Applied Acoustics, 202, 109179.
  14. Lim, J. S., & Choi, Y. J. (2019). Measurement and evaluation of speech privacy in university office rooms. Journal of the Acoustical Society of Korea, 38(4), 396-405. https://doi.org/10.7776/ASK.2019.38.4.396
  15. Meng, Q., An, Y., & Yang, D. (2021). Effects of acoustic environment on design work performance based on multitask visual cognitive performance in office space. Building and Environment, 205(5), 108296.
  16. Park, J. W., Choi, H. T., & Cho, S. W. (2016). A study on the effects of airborne LiDAR data-based DEM-generating techniques on the quality of the final products for forest areas-focusing on GroundFilter and GridsurfaceCreate in FUSION Software. Journal of the Korean Association of Geographic Information Studies, 19(1), 154-166. https://doi.org/10.11108/kagis.2016.19.1.154
  17. Sarwono, J., Larasati, A. E., Novianto, W. N. I., Sihar, I., & Utami, S. S. (2015). Simulation of several open plan office design to improve speech privacy condition without additional acoustic treatment. Procedia - Social and Behavioral Sciences, 184(5), 315-321. https://doi.org/10.1016/j.sbspro.2015.05.096
  18. Sundstrom, E., Town, J. P., Rice, R. W., Osborn, D. P., & Brill, M. (1994). Office noise, satisfaction, and performance. Environment and Behavior, 26(2), 195-222 https://doi.org/10.1177/001391659402600204
  19. Zhang, C., & Um, M. (2020). From contemplation to participation: Empirical study on effect of audience participation on aesthetic experience. Journal of the Korea Convergence Society, 11(8), 287-296. https://doi.org/10.15207/JKCS.2020.11.8.287