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Sound Masking Effective and Perception Evaluation in Open Plan Office

Author: XingXiaoJuan
Tutor: KangJian；JinHong
School: Harbin Institute of Technology
Course: Building Science,
Keywords: Open office Degree of speech privacy Masker Masking effect Perception and Evaluation
CLC: TU243.2
Type: Master's thesis
Year: 2010
Downloads: 67
Quote: 0
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Abstract


Subject Source: National Natural Science Foundation of China overseas, Hong Kong and Macao by the Joint Research Fund (project number: 50928801); National Natural Science Foundation of China (project number: 10674150) and international (regional) cooperation and exchange project (project number: 10811130466). With the wide application of open-plan offices, its internal sound environmental studies is also of great significance. However it is unrealistic to eliminate the interference noise in the office, to improve the quality of indoor acoustic environment can improve the degree of speech privacy. In this thesis, the masker to open office speech privacy. Literature analysis and field research to select a typical open office as the object of study, and test its acoustic environment characteristics. Then choose a different location in the building space, different sound pressure level of the different types of masker, live recording for playback in the laboratory, through objective and subjective articulation index and the entire environment noisy degree and masker \acceptance masker Chinese language and sound interference, resulting in the masking effect of the masker and the subjective perception of the evaluation results. Analysis found: masker types and have a greater impact sound pressure level of the masking sound masking performance in open-plan offices. Noise synthetic class language by the English language in this experiment to select five types of masking sound masking efficiency is much higher than other types of masking sound, but also the lowest acoustic comfort; natural sound, the sound of running water and the stationary noise in the pink noise is better performance masking sound signal type, masking efficiency is higher and also higher acoustic comfort. Meanwhile, with the the language sound masker sound pressure level ratio increases, to bring acoustic comfort is also increased. Finally, the masking performance and architectural space are closely linked. With the increase in indoor early decay time (EDT), the masking sound masking efficiency, but was gradually reduced to bring acoustic comfort. When EDT smaller, rhythm more rushing sound of water and the band [176.75 Hz, 5656Hz pink noise masking better performance, when the larger EDT, the the rhythm soothing sound of water and band [353.5Hz 5656Hz pink noise masking properties. The end of the paper to create a building space to select the the appropriate masker Add to the office, in order to achieve the purpose of improve the degree of open office speech privacy.

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CLC: > Industrial Technology > Building Science > Architectural design > Civil > Administrative buildings, office buildings > Enterprises and office
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