Absolutely! Below is a complete and detailed master list of all possible Noise Control Measures, fully structured under the Hierarchy of Controls – suitable for NEBOSH IG2, construction, manufacturing, factories, and general workplaces. This list includes elimination, substitution, engineering, administrative, PPE, and extra best practices, with no item skipped.

Table of Contents

✅ Full List: Noise Control Measures (Hierarchy of Controls)

🔴 1. Elimination (Most Effective)

Remove the noise hazard entirely.

Eliminate the noisy process entirely
Avoid using noise-producing equipment in the design phase
Prefabricate off-site to eliminate on-site cutting/drilling
Use pre-assembled parts instead of noisy installations
Eliminate need for metal-on-metal work
Relocate noisy activities to remote areas away from workers
Change production methods to quieter alternatives (e.g., adhesive instead of hammering)
Replace noisy process with non mechanical alternative
Avoid working near active generators or compressors

🟡 2. Substitution

Replace the source with a quieter alternative.

Replace diesel generators with battery/electric versions
Use quieter models of machines/tools (e.g., quiet air compressors)
Replace pneumatic tools with hydraulic or electric ones
Replace impact tools (e.g., hammer drills) with rotary tools
Replace metal bins with plastic to reduce impact noise
Use rubber wheels instead of metal for trolleys
Replace alarms with flashing lights (visual warning)
Use variable speed drives (VSD) to reduce noise from motors

🛠️ 3. Engineering Controls

Isolate or reduce the sound at the source, along the path, or at the receiver.

At the Source:

Install Sound Barrier or Acoustic enclosures for (compressors, fans, motors, generators)
Silencers or mufflers on exhausts and pneumatic equipment
Use of sound-dampening materials around machines
Anti-vibration pads, mounts, or isolation bases
Use of dynamic balancing in rotating machinery
Acoustic curtains around noisy equipment
Regular maintenance to reduce mechanical wear (squealing, grinding)

Along the Path:

Sound barriers between noise source and workers
Relocate workstations away from noise-producing machines
Install acoustic baffles on walls or ceilings
Insulate ducts and pipes that transmit noise
Close unnecessary openings or gaps in walls/windows

At the Receiver:

Use enclosed operator cabins with acoustic glazing
Provide quiet rest areas for workers
Install sound-absorbing panels around workstations

📋 4. Administrative Controls

Reduce exposure through policies and work practices.

Rotate workers in high-noise areas to limit time exposure
Post “Hearing Protection Required” signage in affected zones
Restrict access to high-noise areas (e.g., boiler room, compressor house)
Train workers on noise risks and safe practices
Plan noisy work during shifts with fewer workers
Provide quiet workstations for non-noisy tasks
Mark out noise hazard zones with floor paint/tape
Schedule equipment maintenance to prevent excessive noise
Conduct regular noise surveys with sound meters
Implement a hearing conservation program
Perform health surveillance/audiometry testing
Keep noise logs for long-term exposure tracking

🧤 5. Personal Protective Equipment (PPE)

Last resort – only if noise cannot be controlled by other means.

Earplugs (disposable foam, reusable silicone, custom-fit)
Earmuffs (over-the-head or helmet-mounted)
High NRR-rated (Noise Reduction Rating) hearing protection
Dual protection: Earmuffs + earplugs for extremely high noise
Use of electronic earmuffs (allowing speech but blocking noise)
Fit testing and training in proper use of hearing protection
Regular replacement of worn-out PPE
Clean storage and maintenance of PPE

🧩 Other Supporting Measures

Area	Action
Supervision	Ensure correct PPE use and worker rotation
Monitoring	Use dosimeters, sound level meters, and regular assessments
Planning	Plan high-noise tasks during low-traffic periods
Access Control	Secure high-noise areas and use entry permits
Communication	Use radios, hand signals, or visual alarms in noisy environments
Signage	Place clear signs: “Hearing Protection Must Be Worn”
Recordkeeping	Maintain inspection logs, training records, and noise surveys
Emergency	Include hearing-related hazards in first aid and incident reports

📌 Example Noise Control Statement for NEBOSH IG2:

“Diesel generator emits noise above 90 dB(A). Replaced with an electric model and enclosed it in a soundproof barrier. Restricted area with clear warning signs. Earmuffs provided (30 dB NRR), and workers rotated every 2 hours. Noise level monitored weekly.”

🧪 Testing & Measurement Tools:

Class 1/2 Sound Level Meters
Personal Noise Dosimeters
Octave Band Analyzers
Mobile noise monitoring apps (calibrated)
Audiometry testing booths

Noise : Control Measure | Full List of Hierarchy-Based Controls