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The Efficiency of Hearing Protective Devices against Occupational Low Frequency Noise in Comparison to the New Subjective Suggested Method

BACKROUND: Noise is one of the most important occupational and environmental health hazards. Exposure to loud noise can cause irrevocable hearing damage and loss of hearing. The aim of this study was to determine the efficiency of two samples of earmuff and earplug in low frequency noise reduction i...

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Autores principales: Forouharmajd, Farhad, Nazaryan, Kamyar, Fuente, Adrian, Pourabdian, Siamak, Asady, Hadi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Wolters Kluwer - Medknow 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9811961/
https://www.ncbi.nlm.nih.gov/pubmed/36618539
http://dx.doi.org/10.4103/ijpvm.IJPVM_700_20
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author Forouharmajd, Farhad
Nazaryan, Kamyar
Fuente, Adrian
Pourabdian, Siamak
Asady, Hadi
author_facet Forouharmajd, Farhad
Nazaryan, Kamyar
Fuente, Adrian
Pourabdian, Siamak
Asady, Hadi
author_sort Forouharmajd, Farhad
collection PubMed
description BACKROUND: Noise is one of the most important occupational and environmental health hazards. Exposure to loud noise can cause irrevocable hearing damage and loss of hearing. The aim of this study was to determine the efficiency of two samples of earmuff and earplug in low frequency noise reduction in comparison to subjective method. METHODS: All the procedures of the work were done using the simulated human ear canal and the required microphone in the eardrum. At the octave frequencies, that is 31.5 and 63.5, 125, 250, 500, 1000, 2000, 4000, and 8000 Hz, and intensities of 85-90 dB, one stage was done by using the individual's subjective response relative to the received sound before and after using the ear protector. RESULTS: The sound levels before and after the protection were significantly different in both the model and humans (P < 0.05). However, at 315 Hz frequency, the rate of attenuation is increased by 4 dB after placing the earplug and 14 dB after placing the earmuff, showing a reduction of 18 dB. CONCLUSIONS: This study verifies the increasing protection by simultaneous application of earplugs and earmuffs. Because of the laboratory evaluation of ear protectors, it is possible not to justify the proficiency of ear protectors in a subjective method.
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spelling pubmed-98119612023-01-05 The Efficiency of Hearing Protective Devices against Occupational Low Frequency Noise in Comparison to the New Subjective Suggested Method Forouharmajd, Farhad Nazaryan, Kamyar Fuente, Adrian Pourabdian, Siamak Asady, Hadi Int J Prev Med Original Article BACKROUND: Noise is one of the most important occupational and environmental health hazards. Exposure to loud noise can cause irrevocable hearing damage and loss of hearing. The aim of this study was to determine the efficiency of two samples of earmuff and earplug in low frequency noise reduction in comparison to subjective method. METHODS: All the procedures of the work were done using the simulated human ear canal and the required microphone in the eardrum. At the octave frequencies, that is 31.5 and 63.5, 125, 250, 500, 1000, 2000, 4000, and 8000 Hz, and intensities of 85-90 dB, one stage was done by using the individual's subjective response relative to the received sound before and after using the ear protector. RESULTS: The sound levels before and after the protection were significantly different in both the model and humans (P < 0.05). However, at 315 Hz frequency, the rate of attenuation is increased by 4 dB after placing the earplug and 14 dB after placing the earmuff, showing a reduction of 18 dB. CONCLUSIONS: This study verifies the increasing protection by simultaneous application of earplugs and earmuffs. Because of the laboratory evaluation of ear protectors, it is possible not to justify the proficiency of ear protectors in a subjective method. Wolters Kluwer - Medknow 2022-11-23 /pmc/articles/PMC9811961/ /pubmed/36618539 http://dx.doi.org/10.4103/ijpvm.IJPVM_700_20 Text en Copyright: © 2022 International Journal of Preventive Medicine https://creativecommons.org/licenses/by-nc-sa/4.0/This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.
spellingShingle Original Article
Forouharmajd, Farhad
Nazaryan, Kamyar
Fuente, Adrian
Pourabdian, Siamak
Asady, Hadi
The Efficiency of Hearing Protective Devices against Occupational Low Frequency Noise in Comparison to the New Subjective Suggested Method
title The Efficiency of Hearing Protective Devices against Occupational Low Frequency Noise in Comparison to the New Subjective Suggested Method
title_full The Efficiency of Hearing Protective Devices against Occupational Low Frequency Noise in Comparison to the New Subjective Suggested Method
title_fullStr The Efficiency of Hearing Protective Devices against Occupational Low Frequency Noise in Comparison to the New Subjective Suggested Method
title_full_unstemmed The Efficiency of Hearing Protective Devices against Occupational Low Frequency Noise in Comparison to the New Subjective Suggested Method
title_short The Efficiency of Hearing Protective Devices against Occupational Low Frequency Noise in Comparison to the New Subjective Suggested Method
title_sort efficiency of hearing protective devices against occupational low frequency noise in comparison to the new subjective suggested method
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9811961/
https://www.ncbi.nlm.nih.gov/pubmed/36618539
http://dx.doi.org/10.4103/ijpvm.IJPVM_700_20
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