Construction sites can generate high noise levels that disturb surrounding neighborhoods. Operating heavy machinery like excavators, jackhammers and power tools creates loud, intermittent bursts of noise. Generators used to supply electricity to jobsites also produce sustained droning sounds.

Excessive noise exposure raises health concerns like hearing loss and cardiovascular issues for construction crews. It can also degrade quality of life for nearby residents. Noise regulations enforced by local authorities restrict allowable decibel limits for builders.

Switching to Tier 4 emissions compliant mobile generators provides an effective method to limit noise pollution at construction projects. Let’s examine why Tier 4 generators run quieter along with other sound reduction techniques.

What Makes Tier 4 Generators Quieter

Tier 4 refers to the latest EPA emissions standard for diesel engines. It mandates stricter limits on particulate matter (PM) and nitrogen oxides (NOx) released in generator exhaust.

Meeting Tier 4 requirements involves improvements like:

These technologies optimize combustion efficiency for cleaner emissions. They also reduce overall noise levels produced by the engine and exhaust.

Tier 4 generators feature advanced sound attenuation methods to reduce noise pollution and disturbances. Some of the key techniques used include:

Fully Enclosed Weatherproof Casings

Low-Noise Cooling Systems

Hospital-Grade Exhaust Silencers

Low-Speed Fan Settings

Sound-Absorbent Barriers

With implementation of all these noise reduction technologies, Tier 4 generators can operate at noise levels as low as 60 dBA at 23 feet. This allows flexible placement even in urban locations and noise-critical applications. Proper site planning is still essential for minimizing community impacts.

How Much Quieter Are Tier 4 Generators?

Tier 4 generators can operate at noise levels over 50% lower than Tier 2 or 3 models. Actual sound reductions depend on the generator size and load.

For example, a 500 kW Tier 2 generator produces 95 dBA of noise at full load. An equivalent Tier 4 model outputs just 73 dBA — a difference of 22 decibels.

That’s a huge reduction equivalent to making the generator sound 4 times quieter to the human ear.

Here’s a chart comparing typical noise levels for different tiers and generator sizes:

Generator SizeTier 2 Noise LevelTier 4 Noise LevelSound Reduction
500 kW95 dBA73 dBA– 22 dbA
300 kW90 dBA68 dBA– 22 dbA
200 kW87 dBA65 dBA– 22 dbA
100 kW83 dBA63 dBA– 20 dbA

Supplemental Sound Attenuation Methods

Tier 4 generators provide major noise reduction on their own. Additional steps can further minimize sound pollution:

Proper placement, barriers and load management can cut perceived noise by 50% or more. Combining these strategies with Tier 4 generators effectively minimizes construction noise issues.

The Bottom Line

Upgrading to modern Tier 4 mobile generators provides the most convenient method to reduce noise pollution at jobsites. Their advanced sound attenuation technology significantly lowers dBA levels. Supplemental noise mitigation steps can decrease sound even further.

Noise limitations don’t need to restrict construction activities with the right equipment. JC Davis Power’s rental inventory offers premium Tier 4 sound-controlled generators from 200 to 600 kW. Contact our generator experts to find an efficient, low-noise solution for your jobsite power needs.