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How are decibel levels calculated on generators?

Most generator manufacturers calculate dBA levels at full load operation which is measured at 7 metres - that is how we display noise values on this website.

The calculation of dBA levels involves a complicated calculations. The relative noise level of everyday sounds is the best way to understand how loud a generator might be based on its dBA value. For example, two people talking at a distance of 7 metres from you cwould equate to roughly 60 dBA, anything below that is considered to be "whispaer Quiet". Here are a few more examples:

  • Passenger car going 65 mph heard at 7m– 77dBA.
  • Music in a living room – 76dBA.
  • Vacuum cleaner – 70dBA
  • Car horn - 90-105dBA

Some engines tend to be noisier than others and will have some effect on the overall dBA rating of the unit. Obviously, a 10 kW generator is typically quieter than a 40 kW generator if all other conditions are equal. The abatement of noise in all generators is normally a function of the enclosure design, air-flow, and the quality and type of insulation used.

Modern generators are generally very quiet across the board.

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