The effect of occupational noise exposure on systolic blood pressure, diastolic blood pressure and salivary cortisol level among automotive assembly workers

Yaghoubi, Khadijeh; Alimohammadi, Iraj; Abolghasemi, Jamileh; Shandiz, Mehdi Shirin; Aboutaleb, Nahid; Ashtarinezhad, Azadeh

doi:10.1080/10803548.2018.1510608

Cited by 8 publications

(6 citation statements)

References 24 publications

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“…Noise in the large factories not only harm the health of operators and workers [ 1 ], but also increase the error rate during the operation process [ 2 ], both of which would inevitably result in the decrease of production efficiency and the increase of manufacturing cost [ 3 ]. Owing to the inevitable noise resulted from the working equipment, an effective method to reduce the damage of noise is to place the sound absorbing materials around the noise source.…”

Section: Introductionmentioning

confidence: 99%

Development and Optimization of Broadband Acoustic Metamaterial Absorber Based on Parallel–Connection Square Helmholtz Resonators

et al. 2022

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An acoustic metamaterial absorber of parallel–connection square Helmholtz resonators is proposed in this study, and its sound absorption coefficients are optimized to reduce the noise for the given conditions in the factory. A two–dimensional equivalent simulation model is built to obtain the initial value of parameters and a three–dimensional finite element model is constructed to simulate the sound absorption performance of the metamaterial cell, which aims to improve the research efficiency. The optimal parameters of metamaterial cells are obtained through the particle swarm optimization algorithm, and its effectiveness and accuracy are validated through preparing the experimental sample using 3D printing and measuring the sound absorption coefficient by the standing wave tube detection. The consistency between the experimental data and simulation data verifies feasibility of the proposed optimization method and usefulness of the developed acoustic metamaterial absorber, and the desired sound absorption performances for given conditions are achieved. The experimental results prove that parallel–connection square Helmholtz resonators can achieve an adjustable frequency spectrum for the low frequency noise control by parameter optimization, which is propitious to promote its application in reducing the noise in the factory.

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Section: Introductionmentioning

confidence: 99%

Development and Optimization of Broadband Acoustic Metamaterial Absorber Based on Parallel–Connection Square Helmholtz Resonators

et al. 2022

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“…Zamanian et al assessed the sound level among steel industry workers and showed that workers were exposed to the noise level of 92.1 dB (A) in an 8-h working shift. 25 Yaghoubi et al 26 measured the workstations' noise using a sound level meter (Brüel and Kjær, Denmark) and divided the study participants into three groups; the control group, test group 1, and test group 2 who were exposed to 60–70 dB (A), 75–85 dB (A), and 85–95 dB (A) of sound. Stokholm et al measured LAeq every 5 s for 24 h within the range of 70–120 dB (A) using personal dosimeters (Brüel and Kjær, model 4443 and 4445).…”

Section: Resultsmentioning

confidence: 99%

Section: Exposure Assessmentmentioning

confidence: 98%

Effect of occupational noise exposure on cortisol hormone level: A systematic review

Feli

Esmaielpour

Hokmabadi

et al. 2022

Noise & Vibration Worldwide

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Introduction. The aim of this review was to investigate the possible association between noise exposure and cortisol hormone in all noise-exposed job classifications. Materials and methods. In this systematic review, the Medline (PubMed), Scopus, Web of Science, and Embase databases were searched from 1 January 1991 to 28 September 2021. As a result, all English relevant papers among any group of workers, in any workplace, and at any noise level were included. Abstracts without full texts, editorials, letters, case reports, conference proceedings, reviews, in-vitro, and animal studies were excluded. Furthermore, studies were removed in the case that they were conducted on children or general population, did not measure the noise levels in work environments, and simulated the workplace noise or used a noise chamber. Results. The initial search retrieved 5784 articles. Finally, 13 articles were considered for qualitative synthesis. Among all the included studies, most of them (10 vs. three), conducted in various industries reported a statistically significant association between occupational noise exposure and increased levels of cortisol hormone. Conclusion. Our qualitative synthesis of available evidence proposed a potential relationship between occupational noise exposure and cortisol hormone. So, noise can be considered an occupational health concern.

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“…The level of noise detected during these procedures has implications for surgeons beyond that of their hearing health. Acutely, even moderate-level noise increases blood pressure 28 and induces catecholaminergic, inflammatory and oxidative stress pathways, which persist and amplify even after cessation of the noise insult. 29,30 Long-term noise exposure is associated with chronic hypertension, 31,32 hyperglycemia, 33 myocardial infarction, 34 depression, 35 and anxiolytic medication use.…”

Section: Discussionmentioning

confidence: 99%

Evaluating Risk of Noise-Induced Hearing Loss in Otologic Surgery

Cass

Perkins

Bennett

et al. 2022

Ann Otol Rhinol Laryngol

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Objectives: To evaluate risk for noise-induced hearing damage from otologic surgery-related noise exposure, given recent research indicating that noise levels previously believed to be safe and without long-term consequence may result in cochlear synaptopathy with subsequent degeneration of spiral ganglion neurons, degradation of neural transmission in response to suprathreshold acoustic stimuli, and difficulty understanding in background noise. Methods: A prospective observational study of surgeon noise exposure during otologic and neurotologic procedures was performed in a tertiary care center. Surgeon noise exposure was recorded in A- and C-weighted decibel scales (dBA, dBC), including average equivalent (LAeq) and peak (LApeak, LCpeak) levels and noise dose. Results: Sound measurements taken at the ear with continuous recording equipment during cadaveric otologic surgery demonstrated LAeq 80-83 dBA, LApeaks of 105 dBA, LCpeaks of 127 dBC, with noise doses of 0.9% to 6.7%. Sound level measurements during live surgery translabyrinthine approaches yielded lower LAeq of 72 to 74 dBA and lower noise doses compared with temporal bone lab measurements. Raw sound recordings during live surgery demonstrated narrow band, high frequency, high amplitude spikes between 4 and 12 kHz. Conclusion: Noise exposure to surgeons, staff, and patients in the operating room is acceptable per NIOSH recommendations. Temporal bone lab noise exposures are greater, possibly due to poorly maintained drill systems and lack of noise shielding from microscope bulk, yet are also within NIOSH recommended levels.

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The effect of occupational noise exposure on systolic blood pressure, diastolic blood pressure and salivary cortisol level among automotive assembly workers

Cited by 8 publications

References 24 publications

Development and Optimization of Broadband Acoustic Metamaterial Absorber Based on Parallel–Connection Square Helmholtz Resonators

Development and Optimization of Broadband Acoustic Metamaterial Absorber Based on Parallel–Connection Square Helmholtz Resonators

Effect of occupational noise exposure on cortisol hormone level: A systematic review

Evaluating Risk of Noise-Induced Hearing Loss in Otologic Surgery

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