BS ISO 5130-2019 Acoustics一Measurements of sound pressure level emitted by stationary road vehicles.
This document applies only to road vehicles of categories L M, and N equipped with internal combustion engines. Vehicles where an internal combustion engine cannot operate when the vehicle is at stationary conditions are outside the scope of this document.
The method is designed to meet the requirements of simplicity as far as they are consistent with reproducibility of results under the operating conditions of the vehicle.
It is within the scope of this document to measure the stationary A-weighted sound pressure level during
— type approval measurements of vehicle;
— measurements at the manufacturing stage;
— measurements at official testing stations;
— measurements at roadside testing.
This document specifices a test method to determine a reference sound level which Is unique for the vehicle and therefore not suitable to compare against a general limit, as test condition, microphone condition location relative to the sound sources can vary significantly. The test conditions in proximity and at engine speeds significantly higher compared to real operation conditions in traffic are deliberately chosen to enable in-use tests at higher background conditions, which are typical for roadside checks.
Technical background information is given in Annex A.
2 Normative references
The following documents arc 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/IEC Guide 98-3. Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1 995)
ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories
ISO 26101:2017, Acoustics — Test methods for the qualification offree-field environments
IEC 60942:20 17, Elect roacoustics — Sound calibrators
I EC 61183. Electroacoustics — Random-incidence and diffuse-field calibration of sound level meters
IEC 61260-1, Elect roacoustics — Octave-band and fractional-octave-band filters — Part 1: Specifications
I EC 61260-3, Electroacoustics — Octave-band andfractional-octave-bandfilters — Part 3: Periodic tests
IEC 61672-1, Electroacoustics — Sound level meters — Part 1: Specifications.BS ISO 5130 pdf download.