ANSI/ASA S12.76:2017

Describes procedures to measure jet noise from uninstalled military aircraft engines with supersonic exhaust flows. Methods pertain to propulsion systems mounted on outdoor test stands with appropriate inlets and nozzles. Describes detailed measurement procedures for near-field acoustical characterization. Describes far-field measurement procedures to provide data for community noise estimates. Describes required measurement instrumentation, signal processing, data formatting & msmt uncertainty.