STUDY OF NOISE REDUCTION RATE OF HEARING PROTECTION DEVICES BASED ON MICROPHONE IN REAL EAR (MIRE) UNDER LABORATORY CONDITIONS

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BIABANI AZAM; ALIABADI MOHSEN; GOLMOHAMMADI ROSTAM

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Journal: Iranian Journal of Ergonomics Year:2016 | Volume:4 | Issue:2 Page(s): 17-24

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Title

STUDY OF NOISE REDUCTION RATE OF HEARING PROTECTION DEVICES BASED ON MICROPHONE IN REAL EAR (MIRE) UNDER LABORATORY CONDITIONS

Author(s)

BIABANI AZAM | ALIABADI MOHSEN | GOLMOHAMMADI ROSTAM | Issue Writer Certificate

Keywords

HEARING PROTECTORSQ1

MICROPHONE IN REAL EARQ1

NOISE REDUCTION RATEQ1

Abstract

Introduction: Nominal NOISE REDUCTION RATE of the earmuff manufacturers can be different compared with the actual attenuation rate. The present study aimed to determine the actual NOISE REDUCTION RATE of common hearing protection devices using MICROPHONE IN REAL EAR method.Methods: In this study, five brands of common earmuffs used in Iranian industries were investigated on 30 subjects under laboratory conditions. NOISE REDUCTION RATEs of earmuffs were measured based on the ISO 11904 standard, MICROPHONE IN REAL EAR method, using noise dosimeter (SVANTEK, SV 102 model) equipped with a microphone SV 25 model. The earmuffs comfort was also assessed by the developed questionnaire.Results: The results showed that the real NOISE REDUCTION RATEs of the earmuffs were between %49 to %86 of nominal reduction rates. Moreover, the actual insertion losses were much negligible at low noise frequencies. The performances of earmuffs based on manufacturers were not statistically different (P>0.05). Based on subjects' comfort scores, comfort of ear muffs were within the acceptable range. The NOISE REDUCTION RATEs of the different earmuffs of each model were not statistically different as well (P>0.05).Conclusions: Irregular use of earmuff can reduce the real attenuation of earmuff to lower than the minimum rate acquired in this study. Proper training and adequate supervision on proper use of earmuff can affect earmuff fitting along with increasing of real noise attenuation.

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References

PREDICTION OF HEARING LOSSAMONG THE NOISE-EXPOSED WORKERS IN A STEEL FACTORY USING ARTIFICIAL INTELLIGENCE APPROACH

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APA: Copy

BIABANI, AZAM, ALIABADI, MOHSEN, & GOLMOHAMMADI, ROSTAM. (2016). STUDY OF NOISE REDUCTION RATE OF HEARING PROTECTION DEVICES BASED ON MICROPHONE IN REAL EAR (MIRE) UNDER LABORATORY CONDITIONS. JOURNAL OF ERGONOMICS, 4(2), 17-24. SID. https://sid.ir/paper/103246/en

Vancouver: Copy

BIABANI AZAM, ALIABADI MOHSEN, GOLMOHAMMADI ROSTAM. STUDY OF NOISE REDUCTION RATE OF HEARING PROTECTION DEVICES BASED ON MICROPHONE IN REAL EAR (MIRE) UNDER LABORATORY CONDITIONS. JOURNAL OF ERGONOMICS[Internet]. 2016;4(2):17-24. Available from: https://sid.ir/paper/103246/en

IEEE: Copy

AZAM BIABANI, MOHSEN ALIABADI, and ROSTAM GOLMOHAMMADI, “STUDY OF NOISE REDUCTION RATE OF HEARING PROTECTION DEVICES BASED ON MICROPHONE IN REAL EAR (MIRE) UNDER LABORATORY CONDITIONS,” JOURNAL OF ERGONOMICS, vol. 4, no. 2, pp. 17–24, 2016, [Online]. Available: https://sid.ir/paper/103246/en

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