Classification of sound environment based on subjective response with speech privacy in open plan offices

2022 ◽  
Vol 189 ◽  
pp. 108595
Author(s):  
Hyun In Jo ◽  
Beta Bayu Santika ◽  
Haram Lee ◽  
Jin Yong Jeon
Keyword(s):  
Subjective Response ◽  
Sound Environment ◽  
Open Plan

Just noticeable difference of sound pressure level of speech in open-plan office

2021 ◽  
Vol 263 (1) ◽  
pp. 5166-5169
Author(s):  
Haram Lee ◽  
Hyunin Jo ◽  
Jin Yong Jeon
Keyword(s):  
Sound Pressure Level ◽  
Sound Pressure ◽  
Paired Comparison ◽  
Subjective Evaluation ◽  
Simulation Models ◽  
Pressure Level ◽  
Just Noticeable Difference ◽  
Sound Sources ◽  
Sound Environment ◽  
Open Plan

In this study, the general sound environment characteristics of open-plan office (OPO) were investigated, and just noticeable difference (JND) of sound pressure level of speech at a distance of 4 m (Lp,A,S,4m) suggested in ISO 3382-3 was suggested. First, in order to understand the sound environment characteristics of OPO, one minute sound sources recorded in 8 offices were collected and physical and psychological acoustic characteristics were analyzed. A total of 30 office workers were subject to subjective evaluation on 8 sound sources, and they were asked to respond to questionnaires related to annoyance, work satisfaction, and speech privacy. Next, to investigate the JND, two computer simulation models identical to those of the actual OPO were implemented, and sound sources each having six different Lp,A,S,4m values were generated through the change of the sound absorption coefficient of the interior finish. The JND of Lp,A,S,4m was presented by performing paired comparison for the same subjects. It is expected that the JND of Lp,A,S,4m proposed in this study can be used for the sound environment rating of OPO.

Measurement survey using acoustic measurement network and sound environment evaluation system by experience sampling

2021 ◽  
Vol 263 (1) ◽  
pp. 5063-5070
Author(s):  
Kengo Togashi ◽  
Akiko Sugahara ◽  
Yasuhiro Nagasawa ◽  
Yasuhiro Hiraguri ◽  
Kazunori Harada ◽  
...  
Keyword(s):  
Evaluation System ◽  
Experience Sampling ◽  
Individual Characteristics ◽  
Working Environment ◽  
Sound Environment ◽  
Open Plan ◽  
Trial Basis ◽  
The Individual ◽  
Intellectual Productivity ◽  
The Impact

The use of open-plan offices is increasing as they are effective in improving intellectual productivity by fostering a communication among workers. Previous research on the relationship between the indoor sound environment and intellectual productivity has mostly reported the impact of the sound environment on the tasks that individuals work on. However, there has been no research on the impact of sound environment on office spaces where multiple workers are actually working. In this study, we developed a system that can analyze the individual characteristics of workers in relation to the sound environment by simultaneously measuring their evaluation to the sound environment and the sound environment of the office. The system collected workers' evaluation of their impressions to the sound environment through a regular questionnaire using the experience sampling method. At the same time, it measured the sound environment of the office with multiple small measurement devices. The obtained sound environment evaluation data and the acoustic data of the office were stored in a single database. Finally, this system was run in a working environment to evaluate the sound environment on a trial basis.

The effect of sound masking on employees' acoustic comfort and performance in open-plan offices in Canada

2021 ◽  
Vol 263 (1) ◽  
pp. 5678-5683
Author(s):  
Roderick Mackenzie ◽  
Joonhee Lee ◽  
Vincent Le Men ◽  
Farideh Zarei
Keyword(s):  
Work Performance ◽  
Signal To Noise Ratio ◽  
Sound Level ◽  
Sound Levels ◽  
Before And After ◽  
Acoustic Comfort ◽  
Sound Environment ◽  
Open Plan ◽  
Sound Masking ◽  
And Performance

Sound masking systems are commonly used in open-plan offices to generate a controlled minimum level of background sound, in order to decrease the signal-to-noise ratio of intrusive speech and blend out transient office noise. However, a question in the acoustical design of offices is whether the self-generated noise of occupants may alone be sufficient to provide the background sound level conditions necessary to achieve similar levels of speech privacy and acoustic comfort as sound masking systems. This study examines the relationship between occupant-perceived speech privacy and acoustic comfort under three different acoustic scenarios (no masking, controlled 42 dBA, and 47 dBA masking sound levels). The study was conducted pre-COVID-19 in two separate open-plan offices located in Quebec, Canada that at the time were close to full occupancy. Employees completed subjective questionnaires before and after each change in conditions, focusing on how the sound environment impacted their comfort and work performance during the study. Statistical results show that the occupants were significantly more satisfied during the two sound masking conditions in comparison to the no-masking condition, where only the occupant-generated and exterior/mechanical system noise was present as the background sound. Implications for open-plan offices with lower occupancy conditions post-COVID-19 are discussed.

scholarly journals The Acoustic Environments in Which Older Adults Wear Their Hearing Aids: Insights From Datalogging Sound Environment Classification

2018 ◽  
Vol 27 (4) ◽  
pp. 594-603 ◽  
Author(s):  
Larry E. Humes ◽  
Sara E. Rogers ◽  
Anna K. Main ◽  
Dana L. Kinney
Keyword(s):  
Older Adults ◽  
Hearing Aids ◽  
Hearing Aid ◽  
Social Activity ◽  
Automatic Classification ◽  
Acoustic Environment ◽  
Age Related ◽  
Sound Environment ◽  
Acoustic Environments

Purpose This report presents data on the acoustic environments in which older adults with age-related hearing loss wear their hearing aids. Method This is an observational study providing descriptive data from 2 primary datasets: (a) 128 older adults wearing hearing aids for an average of 6 weeks and (b) 65 older adults wearing hearing aids for an average of 13 months. Acoustic environments were automatically and continuously classified about every 4 s, using the hearing aids' signal processing, into 1 of 7 acoustic environment categories. Results For both groups, older adults wore their hearing aids about 60% of the time in quiet or speech-only conditions. The automatic classification of sound environments was shown to be reliable over relatively short (6-week) and long (13-month) durations. Moreover, the results were shown to have some validity in that the obtained acoustic environment profiles matched a self-reported measure of social activity administered prior to hearing aid usage. For a subset of 56 older adults with data from both the 6-week and 13-month wear times, the daily amount of hearing aid usage diminished but the profile of sound environments frequented by the wearers remained stable. Conclusions Examination of the results from the automatic classification of sound environments by the hearing aids of older adults provides reliable and valid environment classifications. The present data indicate that most such wearers choose generally favorable acoustic environments for hearing aid use.

scholarly journals STUDY ON SOUND ENVIRONMENT OF OPEN-PLAN SCHOOLS

2009 ◽  
Vol 74 (643) ◽  
pp. 1033-1041 ◽  
Author(s):  
Kanako UENO ◽  
Kuniko HASHIMOTO ◽  
Ryoko KURAKAZU
Keyword(s):  
Sound Environment ◽  
Open Plan

scholarly journals Audiosfera środowiska pracy w przestrzeni biurowej na planie otwartym. Wyniki zwiadu badawczego

e-mentor ◽  
2021 ◽  
Vol 89 (2) ◽  
pp. 57-66
Author(s):  
Patrycja Mizera-Pęczek ◽  
Keyword(s):  
Organizational Climate ◽  
Sound Sources ◽  
Research Directions ◽  
The Real Estate ◽  
Office Space ◽  
Starting Point ◽  
Service Department ◽  
Research Interview ◽  
Sound Environment ◽  
Open Plan

Organizations differ in terms of the soundscapes they shape. The workplace soundscape, i.e., the sound environment of the employee, is not only an element of organizational culture, but above all, insufficiently recognized by organizational and management researchers, a tool for stimulating or inhibiting the activity of employees. In the light of the issues outlined in this way, the article deals with the characteristics of the soundscape in an open-plan office space, which is specific due to the potential number of various sound sources spreading in the work environment without clear acoustic barriers. The aim of the article is to discuss examples of the functioning of employees in a specific sound environment and to indicate the proposed research directions on the soundscape of the workplace in an open plan office. The article is theoretical and empirical. The research interview included an analysis of the literature on the soundscape of various workspaces, an analysis of the content obtained from employees' statements on social media about the sounds that accompany their work, and an analysis of interviews with employees of the real estate service department of one of Polish corporations about the soundscape of the office space they manage. The survey shows that the workplace soundscape is not the only a matter of the employees' sense of aesthetics. Studying the sounds of work can be both an impulse for in-depth research on the organizational climate and a starting point for creating workspace management programs.

Effect of visual elements on Indoor soundscape perception in open-plan office

2021 ◽  
Vol 263 (1) ◽  
pp. 5161-5165
Author(s):  
Beta Bayu Santika ◽  
Hyun In Joo ◽  
Jin Yong Jeon
Keyword(s):  
Work Performance ◽  
Subjective Evaluation ◽  
Visual Stimuli ◽  
Work Productivity ◽  
Computer Software ◽  
Design Guideline ◽  
Visual Elements ◽  
3D Engine ◽  
Sound Environment ◽  
Open Plan

This study examined the effect of changes in visual elements on spatial comfort and work productivity in the aspect of indoor soundscape perception in the open-plan office (OPO) sound environment. Various OPO visual stimuli were simulated using computer software (Unity 3D engine) to change the visual environment by varying variables such as worker density, window ratio, green ratio, and ceiling height. An interactive virtual reality environment was implemented to perform a specific task while experiencing the audio-visual stimuli combining the general OPO noise stimulus and the simulated OPO visual stimulus. Subjective evaluation was performed on a total of 30 subjects to evaluate indoor soundscape quality and work performance for each stimulus. Based on the results of this study, a pleasant OPO design guideline was proposed. Keywords: Open-plan office, indoor soundscape, interactive VR test, spatial comfort

scholarly journals Audiosfera środowiska pracy w przestrzeni biurowej na planie otwartym. Wyniki zwiadu badawczego

e-mentor ◽  
2021 ◽  
Vol 89 (2) ◽  
pp. 57-66
Author(s):  
Patrycja Mizera-Pęczek ◽  
Keyword(s):  
Organizational Climate ◽  
Sound Sources ◽  
Research Directions ◽  
The Real Estate ◽  
Office Space ◽  
Starting Point ◽  
Research Interview ◽  
Sound Environment ◽  
Open Plan ◽  
The Subject

Organizations differ in terms of the soundscapes they shape. The workplace soundscape, i.e., the sound environment of the employee, is not only an element of organizational culture but, above all, a tool for stimulating or inhibiting the activity of employees still insufficiently recognized by organizational and management researchers. In the light of the issues outlined in this way, the article deals with the characteristics of the soundscape in an open-plan office space, which is specific due to the potential number of various sound sources spreading in the work environment without clear acoustic barriers. The article aims to discuss examples of the functioning of employees in a specific sound environment and to indicate the proposed research directions on the soundscape of the workplace in an open-plan office. The article is theoretical and empirical. The first stage of the research interview covered an analysis of the literature on the soundscape of various workspaces. Then the employees’ utterances on social media about the sounds that accompany their work were analyzed. And last but not least the interviews with employees of the real estate service department of one of the Polish corporations about the soundscape of the office space they manage were the subject of analysis. The survey shows that the workplace soundscape is not only a matter of the employees’ sense of aesthetics. Studying the sounds of work can be an impulse for in-depth research on the organizational climate and a starting point for creating workspace management programs.

Note on the spectral classification of carbon stars in the photographic infrared region

1966 ◽  
Vol 24 ◽  
pp. 21-23
Author(s):  
Y. Fujita
Keyword(s):  
Infrared Region ◽  
Spectral Classification ◽  
Carbon Stars

We have investigated the spectrograms (dispersion: 8Å/mm) in the photographic infrared region fromλ7500 toλ9000 of some carbon stars obtained by the coudé spectrograph of the 74-inch reflector attached to the Okayama Astrophysical Observatory. The names of the stars investigated are listed in Table 1.

Diagnostic Value of Electron Microscopy in Soft Tissue Tumors

1970 ◽  
Vol 28 ◽  
pp. 220-221
Author(s):  
Gerald Fine ◽  
Azorides R. Morales
Keyword(s):  
Cardiac Myxoma ◽  
Osteogenic Sarcoma ◽  
Diagnostic Value ◽  
Soft Tissue Tumors ◽  
Amelanotic Melanoma ◽  
Growth Patterns ◽  
Light Microscopic Level ◽  
Mesenchymal Tumors ◽  
Good Agreement

For years the separation of carcinoma and sarcoma and the subclassification of sarcomas has been based on the appearance of the tumor cells and their microscopic growth pattern and information derived from certain histochemical and special stains. Although this method of study has produced good agreement among pathologists in the separation of carcinoma from sarcoma, it has given less uniform results in the subclassification of sarcomas. There remain examples of neoplasms of different histogenesis, the classification of which is questionable because of similar cytologic and growth patterns at the light microscopic level; i.e. amelanotic melanoma versus carcinoma and occasionally sarcoma, sarcomas with an epithelial pattern of growth simulating carcinoma, histologically similar mesenchymal tumors of different histogenesis (histiocytoma versus rhabdomyosarcoma, lytic osteogenic sarcoma versus rhabdomyosarcoma), and myxomatous mesenchymal tumors of diverse histogenesis (myxoid rhabdo and liposarcomas, cardiac myxoma, myxoid neurofibroma, etc.)

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