BS ISO 6798-2:2020 pdf free.Reciprocating internal combustion engines – Measurement of sound power level using sound pressure.
BS ISO 6798-2 This document specifies the survey method, which is the measurement method of the sound power level for reciprocating internal combustion engines.This document applies to all reciprocating internal combustion engines falling within the field of application of ISO 3046-1 and other internal combustion engines where no suitable International Standard exists.
NOTE In this document, reciprocating internal combustion engines are referred to as engines unless otherwise explained.The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 3046-1, Reciprocating internal combustion engines一Performance 一Part 1: Declarations of power, fuel and lubricating oil consumptions, and test methods一Additional requirements for engines for general use ISO 3046-3, Reciprocating internal combustion engines一Performance 一Part 3: Test measurements
ISO 6798-1, Reciprocating internal combustion engines一Measurement of sound power level using sound pressure一Part 1: Engineering method ISO 6926, Acoustics一Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels IEC 60942, Electroacoustics一Sound calibrators IEC 61672-1, Electroacoustics一Sound level meters一Part 1:Specifications.The test environment shall be a room or a flat outdoor area which is adequately isolated from background noise and which meets the qualification requirements given in 4.3. Environmental conditions having an adverse effect on the microphones used for the measurements (e.g. wind, impingement of air discharge, high or low temperatures) shall be avoided. The instructions of the manufacturer on the measuring instrumentation regarding adverse environmental conditions shall be followed. Particular care should be exercised to ensure that any plane does not radiate any appreciable sound due to vibrations.BS ISO 6798-2 pdf downlaod.