جستجوی مقالات مرتبط با کلیدواژه "loudness perception" در نشریات گروه "پزشکی"

Background and

Low frequency noise (LFN), even at low levels, can have an adverse effect on individual's mental health and performance. However, personality trait is one of the most important influencing factors. Therefore, the aim of this study was to investigate the perception of loudness, sensitivity, and annoyance of LFN in relation to personality traits.

This semi-experimental research was conducted on 40 students of Mazandaran University of Medical Sciences in 2022. The Eysenck Personality Questionnaire‐Revised (EPQ‐R) was used to assess personality traits. Participants were exposed to LFN at Equivalent continuous sound level (Leq=65 dB in A-weighted) for one hour in an acoustic room. Then questionnaires of noise annoyance, Weinstein noise sensitivity, and loudness perception were used, respectively. Finally, statistical analysis was performed using SPSS V25 and applying Chi-square, independent t-test, and multivariate analysis of variance (MANOVA).

The mean value of annoyance, sensitivity, and noise perception were 5±2.05, 65.2±14.88, and 3.55±0.68, respectively. The results of the study indicated that extroverted and introverted personality traits did not have a significant correlation with annoyance, sensitivity, or perception of loudness (P>0.05) while the results of the MANOVA test showed that neuroticism was the most influential factor on sensitivity (P<0.05).

The findings of this study have confirmed that personality traits, such as neuroticism, can significantly affect the sensitivity of individuals when exposed to low frequency noise. As a result, it is important to consider factors beyond engineering control solutions to address and  reduce the levels of annoyance caused by noise. Therefore, other influential factors such as individuals' personality traits should also be taken into account.

Occupational noise exposure can be associated with various psychological effects. The present study was conducted with the aim of determining the relationship between noise exposure, annoyance, and loudness perception and social intelligence and general decision-making styles in workers.

This descriptive study was conducted in a mine in Yazd Province in 2022. In this research, 65 workers were selected by convenience sampling and included in the study. In order to determine the level of noise exposure of workers, dosimetry was performed using a TES-1354 device. According to the sound equivalent level, workers were divided into two groups of permitted and unauthorized noise exposure. Worker's annoyance and loudness perception were determined using a questionnaire. Also, in order to evaluate social intelligence, Silvera et al.'s questionnaire was used. Decision-making styles were evaluated by Scott and Bruce's questionnaire. Data analysis was performed using independent sample t-test, Pearson and Spearman’s correlation coefficients, and chi-square and Mann-Whitney tests.

In the present study, there was no significant difference between the two studied groups in terms of demographic variables (p>0.05). The median score of noise annoyance (p<0.001) and loudness perception (p=0.003) were significantly higher in the workers with unauthorized noise exposure. Also, the mean score of the avoidant decision-making style was significantly higher in the workers with unauthorized noise exposure (p=0.018).

In general, the results of the present study showed that unauthorized noise exposure was related to annoyance, loudness perception, and avoidant decision-making style. Considering the non-auditory effects of noise exposure, it seems necessary to implement a hearing protection program in workplaces with unauthorized noise.

 Although noise characteristics such as intensity and frequency are the main cause of detrimental effects, it is important to pay attention to the personality traits of individuals as the host of adverse health effects. The aim of this study was to investigate the effect of personality traits on sensitivity, annoyance and loudness perception due to exposure to high frequency sound.

 This interventional and experimental study was carried out among 80 undergraduate and postgraduate students in 2017. First, examinee were exposed to a high frequency noise at 65 dBA for one hour in an acoustic room. Then, to determine amount of annoyance, sensitivity, loudness perception and to investigate personality traits, questionnaire of noise annoyance, noise sensitivity, loudness perception and Eysenck personality inventory was used, respectively. Finally, Chi-square, independent t-test and multivariate analysis of variance (MANOVA) were used to data analyze.

 The mean±SD of sensitivity, annoyance and loudness perception were 54.08±7.71, 7.0±1.53, and 2.79±1.13, respectively in this study. The mean scores of sensitivity, annoyance and loudness perception were significantly different in terms of personality traits, so that their average was higher in the neurotic and introverted. Based on MANOVA test results, personality traits had a significant effect on sensitivity, annoyance and loudness perception of individuals. In a way, the neuroticism and introversion had the greatest effect on the sensitivity and annoyance, respectively.

 The results of this study showed that personality traits such as introversion and neuroticism can affect the sensitivity, annoyance and loudness perception of individuals.

Common audiometric tests can assess if there is any hearing injury or not, but they can not assess the impact of disability due to hearing loss, individual's satisfaction level from rehabilitation services, and the impact of disability on life, due to hearing loss. These items can be assessed using self-assessment questionnaires. This study aimed to use self-assessment Profile of Aided Loudness (PAL) questionnaire to compare satisfaction and loudness levels of sounds in young individuals and elderlies with moderate and severe hearing loss using hearing aid.
In this cross-sectional study, 20 young individuals with age range of 20 to 40 years and 20 elderlies with age range from 60 to 80 years were enrolled. Satisfaction and sound loudness levels of the hearing aid were assessed using self-assessment PAL questionnaire. Data were collected and analyzed using computer statistical information analysis software.
Loudness level had no significant differences among young individuals and elderlies, and women and men. Loudness level had no significant differences for soft sounds, but for average and loud sounds, the differences were significant. Satisfaction levels did not show any significant differences between moderate and severe hearing loss, and between women and men; but the difference between young individuals and elderlies was significant.
PAL index is efficient to assess the understood sound loudness in an individual with and without hearing aid. Comparing the outcomes of this questionnaire with normal levels is used to select and adjust the hearing aid. The results of this study show that loudness understanding is affected by the level of hearing loss, and satisfaction level is affected by age factor.