Noise measurement is an essential physical factor measurement carried out within the scope of occupational hygiene to determine noise levels to which workers are exposed in the work environment. Machinery, equipment, production lines, and operational processes in industrial facilities can generate high levels of noise. Prolonged exposure to high noise causes permanent hearing loss, physiological disorders, and decreased work performance.
Enterprises must regularly measure noise levels, identify noisy zones, and protect workers’ hearing health through personal exposure measurements.
WHAT IS NOISE MEASUREMENT?
Noise measurement is the process of measuring sound pressure levels and personal noise exposure doses in workplace air using Type 1 or Type 2 sound level meters (noise meters) and personal noise dosimeters. As a result of measurements, ambient noise levels (dBA, dBC) and daily 8-hour personal noise exposure levels (Lex, 8h) are determined.
Noise measurements are conducted as ambient area noise measurements to identify noisy zones, or as personal noise dosimetry to determine workers’ actual exposure levels throughout the workday.
WHY IS NOISE MEASUREMENT IMPORTANT?
Noise-induced hearing loss is one of the most common occupational diseases and is irreversible. Regular noise monitoring protects worker health and ensures compliance with statutory noise regulations.
Thanks to noise measurements:
- Noise levels of machinery and equipment are determined
- Workers’ personal daily noise exposure levels are calculated
- Noise contour maps and noisy zones are established
- Compliance with exposure action and limit values is verified
- Appropriate hearing protectors and acoustic engineering solutions are determined
In conclusion, regular noise measurements are fundamental to preserving worker hearing and creating an acoustically safe working environment.
NOISE MEASUREMENT PARAMETERS
The main noise measurement parameters we carry out as Haliç Occupational Hygiene Laboratory are as follows:
- Personal noise exposure measurement (dosimetry)
- Workplace ambient noise measurement (dBA / dBC)
- In-ear noise measurement
- Machinery and equipment noise measurement
- Peak sound pressure level (Cpeak) measurement
- Noise mapping and acoustic contour surveys
HOW IS NOISE MEASUREMENT PERFORMED?
Noise measurement is performed following a systematic procedure in accordance with occupational health and safety standards:
- Working areas, machinery, and employee task groups are identified
- Measurement points and exposed worker groups are planned
- Sound level meters and personal dosimeters are calibrated before measurement
- Ambient readings and personal dosimetry are recorded during representative work shifts
- Post-measurement calibration checks are verified
- Measurement values are benchmarked against statutory limit values and detailed technical reports are prepared
Measurements must be performed during typical operational conditions and normal production capacity to ensure accurate exposure assessment.
What are the statutory noise exposure limit values?
Pursuant to the Regulation on Protection of Employees from Risks Related to Noise: Lowest exposure action value is 80 dBA; Highest exposure action value is 85 dBA; Exposure limit value is 87 dBA.
When should personal noise dosimetry be preferred?
Personal dosimetry is preferred when employees move between different noise zones throughout the workday or when work tasks involve varying noise levels.
How often should noise measurements be repeated?
- At least periodically in accordance with risk assessment schedules
- When new machinery or production lines are installed
- When production processes, layout, or work methods change
- When requested by an occupational safety specialist or workplace physician
- During official inspections
NOISE MEASUREMENT AND TECHNICAL REPORTING
Haliç Occupational Hygiene Laboratory conducts personal and ambient noise measurements using calibrated precision instruments, delivering comprehensive technical compliance reports benchmarked against national standards and regulations.
In conclusion, enterprises obtain actionable data to implement engineering controls, select adequate hearing protection, and maintain full regulatory compliance.
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