Ali Sobhani Dargah, Mohsen Aliabadi, Rostam Golmohamadi, Maryam Farhadian, Mohamad Babamiri, Shiva Mohammadjani Kumeleh,
Volume 12, Issue 4 (Iranian Journal of Ergonomics-In Press 2025)
Abstract
Objectives: The present study aimed to investigate the effect of tonal noise and background speech on neurophysiological parameters and noise annoyance based on personality characteristics.
Methods: In this experimental study, 25 male students were exposed to four scenarios of tonal noise, irrelevant speech, and broadband noise as a reference in a simulated laboratory environment. The LF/HF index and galvanic skin response were recorded before and during exposure to the noise. The level of noise annoyance was determined at the end of each test session using the noise annoyance questionnaire according to ISO 15666.
Results: Repeated measures analysis of variance (RMANOVA) indicated that the difference between the values of neurophysiological indices and noise annoyance in different noise exposure scenarios was significant (P<0.05). The effect of different tonal sound levels on galvanic skin response and noise annoyance was significant (P<0.05). In addition, the effect of 65 dB tonal sound level and 55 dB speech sound level on the LF/HF index was reported to be significant (P<0.05). Also, the effect size of 1.919 in exposure to 65 dB tonal sound level had the highest value compared to other noise exposure scenarios for the noise annoyance variable.
Conclusion: Exposure to different levels of tonal noise and irrelevant speech leads to disruption of individuals' neurophysiological parameters and noise annoyance in individuals regarding some of their characteristics and personality traits.
Kamyar Rostamabadi, Yadollah Hamidi, Mohammad Babamiri, Leili Tapak, Zahra Toosi,
Volume 12, Issue 4 (Iranian Journal of Ergonomics-In Press 2025)
Abstract
Objectives: Health centers are the first level to provide care, and job performance is important to achieving the goals of the health systems. One of the factors that affects job performance is organizational culture. Therefore, the present study aimed to determine the relationship between organizational culture and employee job performance.
Methods: The present cross-sectional study (descriptive-analytical) was conducted on 210 employees in one of the health centers of Kermanshah province using the census method in the years 2021-2022. Standard questionnaires were used to collect information, including the Denison Standard Organizational Culture Questionnaire and the Employee Job Performance Evaluation Questionnaire. The collected information was entered into SPSS (version 25) software and analyzed with statistical tests. A significance level of less than 0.05 was considered.
Results: There is a direct and significant relationship between the dimensions of organizational culture and employee job performance (P<0.05). Age and work experience had an inverse relationship with the dimensions of employee job performance (quality of work and initiative). Gender had a significant relationship with the organizational leadership dimension, and marital status had a significant relationship with initiative (P<0.05).
Conclusion: Organizational culture has a direct and significant relationship with the dimensions of employee job performance; therefore, by improving organizational culture, we can witness effective and sustainable changes in job performance. In addition, some demographic variables are also related to the level of employee job performance, and organization managers should pay attention to these variables when hiring.
