• Attakorn Khamchatra Faculty of Science and Technology Rambhai Barni Rajabhat University
  • Aeknarin Thanakitpairin
  • Jakkapan Potipat




Noise map, Geographic information system, Audiometry, Mobile application


Evaluation of noise levels in a steel structure maintenance factory done by recorded sound level each point, 5 minutes, and process noise maps with geographic information program. It found that the lowest noise level was 51.0 dB(A) in an open area and the highest noise level was 104.2 dB (A) in a sand blasting department. The hearing test conducted by mobile applications collecting data from 18 employees in sand blasting departments, steel fabrication departments 1 and 2, an average age of employees was 40.7 ± 8.4 years. The results showed that 12 employees with normal hearing, 5 employees with awareness level and another with abnormal hearing level. In addition, every group found audiometric notches, 6 employees have V-shaped notch on the right, 3 employees have U-shaped notch, and another one has V-shaped on the left ear. The highest average noise level was in sand blasting department, but it has only one awareness level employee, because of safe work procedures. And the noise level in steel fabrication department 1 was more than 85 dB(A). Therefore, they should use a noise dosimeter, increase the number of sample groups, re-check audiometric tests, and improve a safe working environment.


Bereau of Occupational and Environmental Disease. Manual of noise induced hearing loss surveillance. Department of Disease Control, Ministry of Public Health, 2004. Available at: http://envocc.ddc. moph.go.th/uploads/media/manual/Page1.pdf. Accessed October 15, 2020.

Cameron I, McBain C. Occupational Noise Induced Hearing Loss and Audiometry. The State Insurance Regulatory Authority, 2019. Available at: https://www.sira.nsw.gov.au/__data/assets/pdf_file/ 0006/603429/Occupational-Noise-Induced-Hearing-Loss-and-Audiometry-rapid-review.pdf. Accessed January 25, 2021.

Chernbamrung T, Pichetwirachai W, Chanduaywit S. et al. The Presence of Notch Shape and Notch Area Observed in Annual Audiometric Test of Employees from 9 Factories in Rayong Province, Thailand, Journal of Public Health 2018;48(1):33-43.

Clason D. The best smartphone decibel meter apps to measure noise levels. Healthy hearing, 2019.

Available at: https://www.healthyhearing.com/report/47805-The-best-phone-apps-to-measure-noise-levels. Accessed January 25, 2021.

Golmohammadi R, Giahi O, Aliabadi M. et al. An Intervention for Noise Control of Blast Furnace in Steel Industry, Journal of Research in Health Sciences 2014;14(4):278-290.

Jiaujan P. Industrial Noise 2, Journal of Safety and Health 2012;5(18):77-87.

Kotchawong K. The reliability of hearing test application in smartphone to evaluate for hearing screening in Ranong hospital, Region 11 Medical Journal 2018;32(2):945-954.

Majidi F, Rezai N. Study of noise map and its features in an indoor work environment through GIS-based software, Journal of Human, Environment and Health Promotion 2016;1(3):138-142.

Masalski M, Kipi ski L, Grysi ski T. Hearing Tests Based on Biologically Calibrated Mobile Devices: Comparison with Pure-Tone Audiometry, JMIR Mhealth and Uhealth 2018; 6(1):e10.

Meinke DK, Norris JA, Flynn B. et al. Going Wireless and Booth-less for Hearing Testing in Industry, International Journal of Audiology 2017;56(1):41-51.

Petprapan R, Khaimook W, Chusong T. Evaluation of Noise levels and noise - induced hearing loss of workers at stone milling factory, Journal of Safety and Health 2015;8(27):13-23.

Shahnaz N, Brown S. How Accurate Are These Smartphone Sound the Measurement Apps. Canadianaudiologist,

Available at: https://canadianaudiologist.ca/feature-4/. Accessed January 25, 2021.

Srisopas A. Industrial Noise Measurements, Journal of Safety and Health 2015;8(27):58-61.

The Association of Occupational and Environmental Diseases of Thailand. Guideline for Standardization and Interpretation of Audiometry in Occupational Health Setting. Bangkok, 2015.




How to Cite

Khamchatra, A., Thanakitpairin , A. ., & Potipat, J. . (2021). EVALUATION OF NOISE LEVEL AND NOISE – INDUCED HEARING LOSS OF WORKERS AT STEEL STRUCTURE MAINTENANCE FACTORY. Life Sciences and Environment Journal, 22(2), 128–136. https://doi.org/10.14456/lsej.2021.1



Research Articles