Noise measurement is essential for industrial usage. However, further attention to preventing noise pollution is needed, especially when working with equipment generating a high noise level, such as gas turbines. This study aims to determine the best way to perform noise measurement and analyze the octave band frequency generated by noise pollution caused by gas turbine equipment. Data from site measurements show that the gas turbines produce more than 85 dB of noise with a Z-weighted measurement. A noise measuring investigation was conducted to obtain the data for the 1/3 octave band. A frequency-domain was used to comprehend the properties of the noise measurement frequency band. The frequency band was classified into three different zones called low, medium, and high frequency, which is useful in noise measurement analysis to identify a viable solution to reduce the noise. On-site sampling was performed at the source, path, and receiver of three separate gas turbine locations within oil and gas operations. The 1/3 octave band data collection results at the sound source, path, and receiver demonstrate the noise level distribution at the perimeter of gas turbine installations in the low and medium frequency ranges. Most of the high noise frequency range is between 250 Hz and 2 kHz for source, path, and receiver. All acquired values are compared to the Department of Safety and Health (Occupational Safety and Health (Noise Exposure) Regulations 2019 in Malaysia. As a result, oil and gas service operators can monitor and take countermeasures to limit noise exposure at oil and gas facilities.

• ASTM C423-17. (2017). Standard test method for sound absorption and sound absorption coefficients by the reverberation room method. ASTM International.

• ASTM E90-09. (2009). Standard test method for laboratory measurement of airborne sound transmission loss of building partitions and elements. ASTM International.

• CCOHS. (2019). Noise - Basic information. Canadian Centre for Occupational Health and Safety.

• Cumpsty, N., & Marble, F. (1977). Core noise from gas turbine exhausts. Journal of Sound and Vibration, 54(2), 297-309. https://doi.org/10.1016/0022-460X(77)90031-1

• DOSH. (2019). Industry code of practice for management of occupational noise exposure and hearing conservation. Department of Occupational Safety and Health Malaysia.

• El-Badawy, A., & El-Arna’outy, W. (2007, July 9-12). Passive noise control of a burner-combustor system of a turbo-fan engine. In 14th International Congress of Sound and Vibration (pp. 1-8). Cairns, Australia. https://doi.org/10.13140/2.1.1065.5686

• Hellberg, A., Andersson, T., & Häggmark, A. (2012). Design, testing and performance of the recently developed 37 MW siemens SGT-750. In Turbo Expo: Power for Land, Sea, and Air (Vol. 44724, pp. 45-50). American Society of Mechanical Engineers. https://doi.org/10.1115/gt2012-68249

• Krishna, C. R. (1999). Survey of noise suppression systems for engine generator sets. Brookhaven National Lab. https://doi.org/10.2172/752962

• Lages, F. P. (1979). Air filtration and sound control systems for gas turbines-the start of the art. In Proceedings of the 8th Turbomachinery Symposium (pp. 83-94). Texas A&M University Libraries. https://doi.org/10.21423/R1MX05

• McAuliffe, D., Morlock, H., & Oran, F. (1963). What to do about gas-turbine noise. In ASME 1963 Aviation and Space, Hydraulic, And Gas Turbine Conference and Products Show (Vol. 79924, p. V001T01A026). American Society of Mechanical Engineers. https://doi.org/10.1115/63-ahgt-77

• Nasidi, I., Ismail, L., & Samsudin, E. (2021). Effect of sodium hydroxide (NaOH) treatment on coconut coir fibre and its effectiveness on enhancing sound absorption properties. Pertanika Journal of Science and Technology,29(1),693-706 https: //doi.org/10.47836/pjst.29.1.37

• Nasidi, I., Ismail, L., & Samsudin, E. (2021). Effect of sodium hydroxide (NaOH) treatment on coconut coir fibre and its effectiveness on enhancing sound absorption properties. Pertanika Journal of Science and Technology, 29(1), 693-706 https://doi.org/10.47836/pjst.29.1.37

• Peters, R. J. (2013). Acoustics and noise control (3rd Ed.). Routledge. https://doi.org/10.4324/9781315847146

• Sam, W. Y., Anita, A. R., Hayati, K. S., Haslinda, A., & Lim, C. S. (2017). Prevalence of hearing loss and hearing impairment among small and medium enterprise workers in Selangor, Malaysia. Sains Malaysiana, 46(2), 267-274. http://dx.doi.org/10.17576/jsm-2017-4602-11

• Themann, C., & Masterson, E. (2019). Occupational noise exposure: A review of its effects, epidemiology, and impact with recommendations for reducing its burden. The Journal of the Acoustical Society of America, 146(5), 3879-3905. https://doi.org/10.1121/1.5134465

• Tiede, D. (1969). Measurement and control of gas turbine noise from an industrial vehicle. In ASME 1969 Gas Turbine Conference and Products Show (Vol. 79832, p. V001T01A025). American Society of Mechanical Engineers. https://doi.org/10.1115/69-gt-25

• Uddin, M., Rahman, A., & Sir, M. (2016). Reduce generators noise with better performance of a diesel generator set using modified absorption silencer. Global Journal of Research in Engineering, 16(1), 1-14.