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Generator Noise vs Distance

Sound level at a neighbor's window, with distance attenuation and any barrier you add, against the local limit.

Inputs

Inputs and assumptions

Take the manufacturer figure at the stated distance and load.

Many manufacturers publish dBA at 23 feet, some at 7 meters.

Usually the property line or the closest neighbor's window.

A solid barrier only helps if it breaks the line of sight between the set and the listener.

Result

Sound level at that distance
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Attenuation from distance alone
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Distance for the same result with half the level
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Margin under the limit
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What to check

  • Manufacturer sound data at the stated distance and load
  • The actual ordinance limit and measurement point

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