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由IEC - International Electrotechnical Commission 发布于 2018-05-01,并于 2018-05-11 实施。
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