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BS EN ISO 26101-2:2024

BS EN ISO 26101-2:2024

$142.49

Acoustics. Test methods for the qualification of the acoustic environment – Determination of the environmental correction

Published By Publication Date Number of Pages
BSI 2024 24
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This document specifies methods for qualifying an environment that approximates to an acoustic free field near one or more reflecting planes. The goal of the qualification is to determine the environmental correction , which is used to correct for reflected sound when determining the sound power level or sound energy level of a noise source from sound pressure levels measured on a surface enveloping the noise source (machinery or equipment) in such an environment. In practice, the  value determined will be a function of both the reflected sound from the test environment and the shape and size of the measurement surface used for the  determination. For the purposes of this document and the documents that refer to it, the differences between  values determined with different measurement surfaces are assumed to be included in the stated measurement uncertainty for the test method.

PDF Catalog

PDF Pages PDF Title
2 undefined
11 4.1 General
4.2 Absolute comparison test
4.3 Methods based on room absorption
4.4 Inverse-square-law qualification of parallelepiped and cylindrical measurement surfaces
4.5 Approximate method based on an estimation of the equivalent absorption area
12 5.1 General
13 5.2 Locations of reference sound source in test environment
5.3 Information to be recorded and reported
14 6.1 General
6.2 Reverberation method
6.3 Two-surface method
15 6.4 Determination of the equivalent absorption area with a reference sound source (direct method)
16 6.5 Information to be recorded and reported
7.1 General
17 7.2 Qualification criteria
7.2.1 General
7.2.2 Maximum allowable deviations from inverse square law
7.2.3 Frequency range to be qualified
7.2.4 Maximum qualified volume
18 7.3 Installation of test sound sources and microphone traverses
7.3.1 Test sound source requirements
7.3.2 Test sound source location
7.3.3 Microphone traverse paths for parallelepiped and cylindrical measurement surfaces
20 7.4 Test procedure
7.4.1 Analysis bandwidth
7.4.2 Generation of sound
7.4.3 Spatial resolution of the measurement points
21 7.5 Information to be recorded and reported
8.1 General
8.2 Information to be recorded and reported

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BS EN ISO 26101-2:2024
$142.49