Industrial Silencers & Acoustic Enclosures: Noise Mitigation Solutions
BritSOLIDS provides high-performance Noise Control Solutions engineered to reduce the decibel levels of industrial fans, blowers, and heavy machinery. Our range of Industrial Silencers and Acoustic Enclosures (Acoustic Booths) ensures your facility remains compliant with UK HSE “Control of Noise at Work” regulations while protecting your workforce.
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The Engineering Behind Noise Reduction
Uncontrolled noise in a processing plant is more than just a nuisance; it is a mechanical vibration that can damage hearing and contribute to equipment fatigue. Our systems are designed to target the specific frequency ranges generated by high-speed Centrifugal Fans and Roots Type Blowers, significantly lowering the sound pressure level (SPL) without compromising airflow efficiency.
- Target Performance: Engineered to reduce noise levels to below 75 dB(A) at a distance of 1 metre, meeting the standard UK threshold for safe operational environments.
- Minimal Pressure Drop: Our silencers feature aerodynamic internal profiles to ensure that noise reduction doesn’t lead to a significant loss in fan or blower performance.
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Specialist Noise Control Range
1. Industrial In-line Silencers (Attenuators)
Designed for direct integration into pipework or ducting systems, our Circular Silencers are the primary choice for air and gas flow applications.
- Dimensions: Standard lengths of 1000mm and 2000mm to provide varying degrees of attenuation.
- Components: Available with suction hoods, vertical chimneys, and protective rain caps for outdoor installations.
- Construction: Heavy-duty galvanised or stainless steel outer shells with high-density mineral wool or acoustic foam linings.
Industrial Silencer 1000 mm Length
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2. Acoustic Enclosures / Soundproof Booths
For larger machinery like blowers, compressors, or granulators, an Acoustic Enclosure provides a complete sound-shielding barrier.
- Construction: Precision-fabricated galvanised steel boxes lined with multi-layer acoustic foam. The cellular structure of the foam traps sound energy and prevents transmission.
- Ventilation: Includes integrated cooling fans and baffled air inlets to prevent equipment overheating while maintaining the acoustic seal.
- Maintenance Access: Features heavy-duty access doors with industrial-grade seals for easy servicing of the enclosed machinery.
Galvanised industrial acoustic enclosure with cooling ventilation for a high-pressure blower.
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Technical Selection: Silencer or Soundproof Enclosure?
| Requirement | Recommended Solution | Key Benefit |
|---|---|---|
| Noise from Pipe/Duct | In-line Circular Silencer | Targeted Airflow Attenuation |
| Blower/Motor Noise | Acoustic Enclosure | Full Machine Shielding |
| Outdoor Weather Protection | Enclosure with Rain Caps | Protection + Noise Control |
| High-Temp Exhaust | Stainless Steel Silencer | Heat & Corrosion Resistance |
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Technical FAQ: Industrial Noise Control
Q: Why is 75 dB(A) the target level?
A: Under UK HSE regulations, the lower exposure action value is 80 dB(A). By reducing machine noise to 75 dB(A) at 1 metre, you ensure that even when multiple machines are running, the total ambient noise remains well within safe limits.
A: Under UK HSE regulations, the lower exposure action value is 80 dB(A). By reducing machine noise to 75 dB(A) at 1 metre, you ensure that even when multiple machines are running, the total ambient noise remains well within safe limits.
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Q: Can these silencers be used for “Dirty Air” applications?
A: For air containing dust or granules, we recommend silencers with specialized linings or “splitter” configurations that prevent material buildup within the acoustic media.
A: For air containing dust or granules, we recommend silencers with specialized linings or “splitter” configurations that prevent material buildup within the acoustic media.
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Q: Are your acoustic booths modular?
A: Yes. Our enclosures can be supplied as a single pre-assembled unit or in modular panels for easy installation around existing machinery with limited access.
A: Yes. Our enclosures can be supplied as a single pre-assembled unit or in modular panels for easy installation around existing machinery with limited access.
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Industrial Noise Assessment & Selection Guide
In the UK, the Control of Noise at Work Regulations (2005) requires employers to take action if noise levels reach 80 dB(A). Most industrial fans and blowers operate between 95 dB(A) and 105 dB(A), meaning a minimum reduction of 20–30 dB(A) is usually required.
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1. Step-by-Step Noise Assessment
- Baseline Measurement: Use a calibrated sound level meter to measure the noise exactly 1 metre away from the machine.
- Identify the Source:
- Is the noise coming from the Pipe/Ductwork? (Requires an In-line Silencer).
- Is the noise radiating from the Motor/Casing? (Requires an Acoustic Enclosure).
- Determine Target Level: Most UK sites aim for a “Safe Zone” of 75 dB(A) at 1 metre to allow for ambient noise from other machinery.
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2. Selecting Silencer Length: 1000mm vs 2000mm
The length of the silencer determines the “Insertion Loss” (the amount of noise removed).
| Silencer Length | Noise Reduction (Typical) | Best Application |
|---|---|---|
| 1000mm | 15 – 22 dB(A) | Standard ventilation, low-pressure fans, and secondary attenuation. |
| 2000mm | 25 – 35 dB(A) | High-pressure blowers, Roots blowers, and primary exhaust lines. |
- Rule of Thumb: If your machine measures over 95 dB(A), a 2000mm silencer is almost always required to reach the 75 dB(A) safety threshold.
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3. Acoustic Enclosure (Booth) Selection
If the motor and mechanical vibrations are the primary noise source, an enclosure is the only solution.
- Standard Enclosure: Galvanised steel with 50mm acoustic foam. Reduces noise by approx. 20 dB(A).
- Enhanced Enclosure: Multi-layer “Mass Loaded” panels with 100mm mineral wool. Reduces noise by up to 35 dB(A).
- Ventilation Note: Ensure the enclosure includes a Baffled Air Inlet. Without it, the machine will overheat, or noise will “leak” through the air intake.