Federal Aviation Administration

Heliport Noise Model (HNM)

The Heliport Noise Model (HNM) is a computer program intended to aide in the assessment of potential noise impacts of helicopter operations. Starting with the release of Version 7.0 of the Integrated Noise Model (INM), INM capabilities replace HNM for the evaluation of helicopter noise impacts.

Page Last Modified: 12/14/10 13:10 EST

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