EVALUATION OF NOISE REDUCTION RATING OF CURRENT EARMUFFS BASED ON FIELD MICROPHONE IN REAL EAR (FMIRE) IN WORKPLACES

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BIABANI AZAM; ALIABADI MOHSEN; GOLMOHAMMADI ROSTAM; FARHADIAN MARYAM; SHAHIDI REZA

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Journal: IRAN OCCUPATIONAL HEALTH JOURNAL Year:2017 | Volume:14 | Issue:4 Page(s): 118-127

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Title

EVALUATION OF NOISE REDUCTION RATING OF CURRENT EARMUFFS BASED ON FIELD MICROPHONE IN REAL EAR (FMIRE) IN WORKPLACES

Author(s)

Keywords

HEARING PROTECTION DEVICESQ1

FIELD MICROPHONE IN REAL EARQ1

NOISE REDUCTION RATINGQ1

INSERTION LOSSQ1

Abstract

Background and aims: Nominal NOISE REDUCTION RATING of the earmuff manufacturers can be different compared with the actual noise attenuation rating. The current study aimed to determine the actual noise reduction rate of current HEARING PROTECTION DEVICES in the real workplaces using a FIELD MICROPHONE IN REAL EAR method (FMIRE).Methods: In this cross-sectional study, five common earmuffs were studied in both industrial environments with different noise nature on the 50 workers who were selected randomly. NOISE REDUCTION RATINGs of ear muffs were measured based on the ISO 11904 standard, microphone in real ear method, using noise dosimeter (SVANTEK, model SV 102) equipped with a microphone SV 25 model which can install inside the ear. In addition, the knowledge, attitudes and performance of employees about hearing protection were assessed by the developed questionnaire. Data were analyzed through SPSS v.21.Results: Independent of the type of noise exposure, actual INSERTION LOSS values for ear muffs in one octave-band frequency was less than the nominal INSERTION LOSS values. Actual noise reduction rates of the earmuffs in the exposed of dominant noise low frequency are less than the nominal reduction rates (p<0.05). Actual NOISE REDUCTION RATINGs of the earmuffs in the exposed of the high-frequency noise were above the nominal NOISE REDUCTION RATINGs which its differences are not statistically significant (p<0.05). The workers' knowledge, attitudes and performance index about hearing protection was within acceptable level.Conclusion: The frequency nature of ambient noise is very impressive on the actual noise reduction rates received from earmuffs. Therefore, data about the frequency analysis of ambient noise is key ingredient when selecting hearing protectors in any workplaces. FMIRE could facilitate rapid and simple measurement of the actual acoustic performance of earmuffs in real conditions of industrial environments.

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References

Study of attitude and behaviors related to using personal protective equipment in employees of constructing subway stations in Esfahan, Iran

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APA: Copy

BIABANI, AZAM, ALIABADI, MOHSEN, GOLMOHAMMADI, ROSTAM, FARHADIAN, MARYAM, & SHAHIDI, REZA. (2017). EVALUATION OF NOISE REDUCTION RATING OF CURRENT EARMUFFS BASED ON FIELD MICROPHONE IN REAL EAR (FMIRE) IN WORKPLACES. IRAN OCCUPATIONAL HEALTH JOURNAL, 14(4 ), 118-127. SID. https://sid.ir/paper/128941/en

Vancouver: Copy

BIABANI AZAM, ALIABADI MOHSEN, GOLMOHAMMADI ROSTAM, FARHADIAN MARYAM, SHAHIDI REZA. EVALUATION OF NOISE REDUCTION RATING OF CURRENT EARMUFFS BASED ON FIELD MICROPHONE IN REAL EAR (FMIRE) IN WORKPLACES. IRAN OCCUPATIONAL HEALTH JOURNAL[Internet]. 2017;14(4 ):118-127. Available from: https://sid.ir/paper/128941/en

IEEE: Copy

AZAM BIABANI, MOHSEN ALIABADI, ROSTAM GOLMOHAMMADI, MARYAM FARHADIAN, and REZA SHAHIDI, “EVALUATION OF NOISE REDUCTION RATING OF CURRENT EARMUFFS BASED ON FIELD MICROPHONE IN REAL EAR (FMIRE) IN WORKPLACES,” IRAN OCCUPATIONAL HEALTH JOURNAL, vol. 14, no. 4 , pp. 118–127, 2017, [Online]. Available: https://sid.ir/paper/128941/en

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