Electro-acoustical measuring equipment for aircraft noise certification

This document establishes the technical specifications and performance requirements for electroacoustic measurement equipment designed specifically for the purpose of determining noise certification in aircraft operations. The scope covers the design, calibration, and operational parameters necessary to ensure accurate assessment of sound pressure levels and frequency characteristics generated by aeronautical vehicles during flight and ground maneuvers. It defines the fundamental principles for the construction of instruments used to capture, process, and display acoustic data relevant to regulatory compliance and safety evaluations. The standard outlines the necessary tolerances for measurement systems, including microphones, amplifiers, and recording devices, to maintain consistency and reliability across different testing environments. By setting uniform criteria for device functionality, it facilitates comparability of results obtained by various organizations and authorities engaged in aviation safety monitoring. The provisions apply to equipment utilized in both laboratory settings and field trials where precise acoustic analysis is required for certification procedures. This framework supports the global harmonization of noise measurement practices without imposing restrictions on specific technological implementations.