IEC 61265:2018 PDF

Scope: This document specifies requirements for the electroacoustical performance of systems of instruments used to measure sound for the purposes of aircraft noise certification@ and for other comparisons among aircraft models@ and provides methods by which tests can be made periodically to verify that the performance continues to conform to the requirements within stated limits. In general@ a sound measurement system for this purpose comprises a combination of instruments extending from a microphone@ including its windscreen and other accessories@ through data recording and processing devices to a suitable output. Different measurement systems@ regardless of their composition@ perform the necessary functions in different ways and operate on either analogue or digital principles.

IEC 61265:2018 history

2018 IEC 61265:2018 Electroacoustics - Instruments for measurement of aircraft noise - Performance requirements for systems to measure sound pressure levels in noise certification of aircraft
1995 IEC 61265:1995/COR1:1995 Electroacoustics - Instruments for measurement of aircraft noise - Performance requirements for systems to measure one-third-octave band sound pressure levels in noise certification of transport-category aeroplanes
1995 IEC 61265:1995 Electroacoustics - Instruments for measurement of aircraft noise - Performance requirements for systems to measure one-third-octave band sound pressure levels in noise certification of transport-category aeroplanes