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ANSI ASA S12.9-2016/Part 7 (R2020)

Quantities and Procedures for Description and Measurement of Environmental Sound, Part 7: Measurement of Low-frequency Noise and Infrasound Outdoors in the Presence of Wind and Indoors in Occupied Spaces

Part 7 of the ANSI/ASA S12.9 series describes cautions and unique techniques for measuring low frequency noise (LFN) outdoors in the presence of wind. It is necessary to measure in wind for wind turbine projects and for countless other industrial power and facilities where environmental wind speed cannot be controlled or levels are specified under downwind conditions.

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Acoustical Society of America [ASA]


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