The effect of sound with different frequencies on men and women noise annoyance

Beheshti, Mohammad Taghi Hamidi; Emkani, Mojtaba; Jebeli, Maryam Borhani; Tajpoor, Ali; Chahack, Ali Firoozi; Yarahmadi, Ghasem; Piramoon, Hamid; Khoshehsahi, Sekineh; Zobeidi, Negar

doi:10.29252/jrh.9.4.355

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…To measure the precision, mental arithmetic test was done at time = 0 (starting time, subjective had no exposure to noise) and 45 and 90 minutes after exposure. LabVIEW software with data acquisition (DAQ) card was made by USA National Instrument[ 17 ] was used for the playing of the noises. To equalize the intervention factors, all the participants in the study had the same conditions during the test.…”

Section: Methodsmentioning

confidence: 99%

The Effect of Low Frequency Noises Exposure on the Precision of Human at the Mathematical Tasks

Javadi

Pourabdian

Forouharmajd

2022

International Journal of Preventive Medicine

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Background: Low-frequency noise is produced from different sources in the working environments such as pumps. Thus, the aim of this study was to investigate the effect of low-frequency noise on precision and focusing of the studied subjects. Methods: This cross-sectional–interventional study was performed on 13 students of Isfahan University of Medical Sciences. The precision of individual subjects was evaluated using the mental arithmetic test. The sound sources with frequencies of 125, 250, and 1000 Hz at 75, 85, and 95 dB sound pressure levels. Also, the rate of precision was measured before the exposure (time “zero”), and at 45 and 90 min. SPSS (Ver. 26) software was used to analyze the data. Results: Comparison of the precision scores of the individuals between the frequencies of 125 and 250 Hz at the sound pressure level of 75 dB and at 45 min (P = 0.032). And 90 min (P = 0.006). And also, the frequencies of 250 Hz and 1000 Hz at the time of 45 min. At the sound pressure levels of 85 dB (P = 0.019). And 95 dB (P = 0.043) and at the time of 90 min. At the sound pressure levels of 85 dB (0.027). And 95 dB (P = 0.009) demonstrated a significant difference. Conclusions: We concluded that low frequency noises could reduce the person's precision. While for 125 Hz noises, just increasing of the exposure time was effective on the precision reduction. But for 250 Hz noises, both parameters increasing including exposure time and sound pressure levels, was effective.

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Section: Methodsmentioning

confidence: 99%

The Effect of Low Frequency Noises Exposure on the Precision of Human at the Mathematical Tasks

Javadi

Pourabdian

Forouharmajd

2022

International Journal of Preventive Medicine

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“…The white noise that is a random signal having equal intensity at different frequencies was generated by Noise.exe software (28), then recorded and played by a sound player mounted on the ceiling of the chamber. To determine the accuracy of the sound intensity and frequency, sound measurements were performed according to ISO7216 standards using the CELL_450 made in the UK.…”

Section: Methodsmentioning

confidence: 99%

Evaluating the Effects of Noise Pollution on the Levels of Blood Cortisol, Testosterone, and Thyroid in Male Wistar Rats

et al. 2021

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Background: Noise pollution is a global problem causing changes in the secretion of various hormones and consequently affecting social well-being and quality of life in cities. Objectives: This study aimed to investigate the effect of noise pollution on the levels of testosterone, thyroid, and cortisol hormones in male rats. Methods: In this experimental study, a total of 70 male Wistar rats (200 - 250 g) were randomly assigned into one control and six experimental groups, with 10 rats in each group. Experimental groups were exposed to noise with different intensity (dB) and time (min) as follows: (I) 60 dB, 30 min; (II) 60 dB, 60 min; (III) 85 dB, 30 min; (IV) 85 dB, 60 min; (V) 110 dB, 30 min; (VI) 110 dB, 60 min; (VII) controls. Animals in the experimental groups were exposed to noise in an acoustic chamber designed for this purpose for 50 days. The Noise.exe software was used to generate noise, and the sound level meter (model TES 1358) was used to determine the accuracy of the intensity and frequency of sound. To determine plasma levels of the hormones, appropriate research and commercial kits were used, which were based on the ELISA method. To determine the concentration of hormones other than TSH, human assay kits were used. All statistical tests were performed in SPSS software version 21. Results: Serum levels of cortisol in the 110-dB (30 and 60 min), 65-dB (60 min), and 85-dB (60 min) groups were significantly higher than the control group (P ≤ 0.05). Also, cortisol levels in the 65-dB and 85-dB (30 minutes) groups were higher than the control group; however, the increase was not significant (P > 0.05). The levels of T4, T3, and TSH in the 60-dB and 85-dB groups were significantly lower than in the control group (P ≤ 0.05). The serum levels of T4, T3, and TSH hormones in the 110-dB group were insignificantly lower than the control group (P > 0.05). The serum level of testosterone in the 110-dB group was significantly lower than the control group (P ≤ 0.05). The mean serum levels of testosterone in the 65-dB and 85-dB groups were insignificantly lower than the control group (P > 0.05). Conclusions: Based on this study, exposure to noise pollution increased cortisol secretion and decreased T4, T3, TSH, and testosterone levels in rats. As this hormonal imbalance may create direct and indirect effects, studies and strategies are recommended to control the imbalance of hormones in the polluted environments.

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“…Noise pollution has special physiological effects on sensitive groups such as pregnant women (18). In another study on the effects of sound on the health of outdoor workers such as taxi drivers (19), it was revealed that it created mistakes in the reaction time and sensitive occupations (20), high levels of sound pressure in large and medium cities (21), and occupational hearing loss at low frequencies (22). The noise level in low and high traffic areas in Shiraz city was higher than the standard levels that increases the sleep disorders and decreases the quality of people's life (23).…”

Section: Introductionmentioning

confidence: 99%

Risk assessment of noise pollution by analyzing the level of sound loudness resulting from central traffic in Shiraz

Negahdari

Javadpour

Moattar

et al. 2018

Environ Health Eng Manag

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Background: Today, the effects of environmental pollution on human life and human needs, which reduces the level of community health caused by traffic noise in large cities, are clearly visible by creating irritation and pathogenic conditions. The aim of this study was to assess the risk of noise pollution resulted from central traffic in Shiraz by analyzing its indicators and related components. Methods: By specifying the high traffic jam in Shiraz, the sound and its frequency in 156 points of the city were analyzed using a sound analyzer (Tes-1358C model). The sound pressure levels (L A and L P ) and the one and one-third octave band were continuously measured in A and C networks. Then, data were extracted and analyzed using Excel 2016 and Minitab 18.1. Eventually, phon and sone indexes were calculated for the heavy traffic jam in some of the central streets of Shiraz and the results were statistically calculated and their charts were prepared with comfort disturbance ranges. Results: The highest harmful frequency of traffic in Shiraz was 50 Hz and 83.3 dB. The sound pressure level ranged from 70 to 92.7 dB in network A and 87.8 dB in network C. The maximum sound level was 87 phon and the maximum sone was 26 at 14 stations. Conclusion: According to the results, the sound pressure levels exceeded the environmental standards of Iran and the values of phon and sone were higher than the standard of comfort at night and day.

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The effect of sound with different frequencies on men and women noise annoyance

Cited by 5 publications

References 7 publications

The Effect of Low Frequency Noises Exposure on the Precision of Human at the Mathematical Tasks

The Effect of Low Frequency Noises Exposure on the Precision of Human at the Mathematical Tasks

Evaluating the Effects of Noise Pollution on the Levels of Blood Cortisol, Testosterone, and Thyroid in Male Wistar Rats

Risk assessment of noise pollution by analyzing the level of sound loudness resulting from central traffic in Shiraz

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