Noise Levels of Construction Equipment
Equipment and daily activities at construction job sites can expose workers to high levels of noise. Noise levels on the chart below are listed in decibels (dBA) - the larger the number, the higher the volume or decibel level. Various factors influence the level of noise received and the degree of possible injury:
- Intensity: How loud the noise is (volume)
- Duration: How long the noise lasts.
- Distance: How close you are to the noise.
- Type: Noise can be continuous, variable, intermittent or impulsive depending on how it changes over time.
Considering all of the above factors, the hammer drill with a noise level of about 115 dBA over an 8-hour period (TWA), is one of the most hazardous tools to use without hearing protection. However, studies indicate that most common carpentry tools have a potential for generating hazardous noise levels, so anyone working on a job site with these types of tools should wear proper hearing protection.
The table below takes a look at average noise levels of equipment and tools on a construction site.
| Equipment or Tool | Noise Level May Exceed (decibels) |
|---|---|
| Backhoe | 85 |
| Bulldozer | 87 |
| Chopsaw | 92 |
| Front End Loader | 90 |
| Grader/Scraper | 107 |
| Hammer Drill | 115 |
| Jackhammer | 85 |
| Nail Gun | 97 |
| Router | 90 |
| Welding Equipment | 92 |
For more useful information on hearing conservation, please see OSHAcademy course 751 Hearing Conservation Program Management.
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2-2. What factors influence the degree of possible injury from noise exposure at construction job sites?
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