Health & Wellbeing
Noise & Vibration Safety
Protecting workers from occupational noise-induced hearing loss (NIHL) and hand-arm / whole-body vibration on UAE construction sites — exposure limits, hearing protection, and tool-time management.
Learning Objectives
- State UAE occupational noise exposure limits and action levels.
- Select and fit appropriate hearing protection (earplugs / earmuffs).
- Recognise hand-arm vibration (HAVS) and whole-body vibration (WBV) risks.
- Manage exposure time using trigger-time limits and job rotation.
- Report early symptoms of hearing loss or vibration white finger.
Training Video
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1. Occupational Noise Limits
UAE ADOSH-SF and Dubai Municipality align with a daily 8-hour exposure limit of 85 dB(A). Above this, hearing protection is mandatory; above 90 dB(A) additional controls are required. Peak sound pressure limit is 140 dB(C). Doubling of noise is every 3 dB — a 88 dB(A) shift is twice the dose of 85.
2. Hierarchy of Noise Control
Eliminate/substitute noisy plant → engineer enclosures, silencers, damping → administrative rotation and shorter trigger time → PPE (hearing protection). PPE is the last line of defence, not the first. Silent-hours planning for adjacent occupied buildings.
3. Hearing Protection Selection & Fit
Match SNR/attenuation to the noise level — over-protection isolates the worker and creates a safety hazard. Earplugs: roll, pull ear up-and-back, insert deep, hold. Earmuffs: hair and glasses arms clear of the cushion seal. Check integrity daily; replace foam plugs each shift.
4. Hand-Arm Vibration (HAVS)
Sources: breakers, grinders, impact drills, needle-guns. Symptoms: tingling, numbness, white/pale fingers (vibration white finger), loss of grip. Manage with vibration-damped tools, correct grip, warm hands, and TRIGGER-TIME limits — not full shift time.
5. Whole-Body Vibration (WBV)
Plant operators (dumpers, rollers, excavators) are exposed to WBV through the seat. Suspension seats maintained, tyre pressures correct, site roads graded. Rotate operators on high-vibration plant; report back pain early.
6. UAE Requirements & Reporting
Federal Decree-Law 33/2021 and ADOSH-SF require noise/vibration risk assessment, health surveillance (audiometry) for exposed workers, and documented training. Early symptoms of hearing loss, tinnitus or HAVS must be reported to the site nurse — losses are permanent.
Knowledge Assessment
1. The UAE 8-hour occupational noise limit is:
2. The peak sound pressure limit is:
3. Doubling of noise exposure occurs every:
4. The first line of noise defence should be:
5. Over-protection with hearing PPE is a problem because:
6. Foam earplugs should be:
7. Vibration white finger is caused by:
8. HAVS exposure is managed by:
9. Whole-body vibration (WBV) affects mainly:
10. Health surveillance for noise-exposed workers means:
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