Noise Impact Assessment Calculator

Calculate received noise levels at a receptor from a point source accounting for distance, atmospheric absorption, ground effects, and barriers per ISO 9613-2.

Inputs

Source level (dBA)

Receiver distance (ft)

Reference distance (ft)

Ground type

Barrier height (ft)

Receiver land use

Tab to move between fields

Results

Received level (dBA)

62.8

Total attenuation (dB)22.2

Geometric spreading (dB)20

Barrier insertion loss (dB)0

Regulatory threshold (dBA)60

Threshold exceedance (dBA)2.8

Required barrier height (ft)0

Distance to threshold (ft)889

How to Use This Calculator

Enter Source Level (dBA) from equipment specifications or field measurements.
Set Receiver Distance (ft) and Reference Distance (ft) for the inverse square law baseline.
Select Ground Type (hard/reflective or soft/absorptive) and Barrier Height (ft) if present.
Choose Receiver Land Use (residential, commercial, industrial) to apply the applicable noise standard.
Review Received Level (dBA) and compare to local ordinance limits or FHWA noise thresholds.

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