What is dB(A)?
Generator sound levels are measured in decibels (dB). The “A” weighting — written as dB(A) — reflects how the human ear perceives sound.
Noise is usually quoted at 7 metres. Always compare specifications measured at the same distance.
Typical Generator Noise Levels
| Noise Level (dB(A)) | Real-World Comparison | Generator Type |
|---|---|---|
| 50–60 dB(A) | Normal conversation | Ultra-silent units |
| 60–70 dB(A) | Office environment | Silent canopy generators |
| 70–80 dB(A) | Busy road traffic | Standard site generators |
| 80+ dB(A) | Heavy machinery | Open-frame generators |
What Influences Generator Noise?
- Engine size and load level
- Acoustic canopy insulation
- Exhaust silencer specification
- Placement and surroundings
- Distance from source
Silent vs Super Silent
“Silent” generators use acoustic enclosures to reduce operational noise. “Super silent” models include enhanced insulation and improved airflow for even lower sound output.
For residential areas, schools or 24/7 sites, a super silent specification is often recommended.
UK Noise & Compliance
Local authorities may impose restrictions on site noise, especially near housing. Selecting the correct generator early helps prevent complaints and disruption.
