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BS EN ISO 15186-3:2010

BS EN ISO 15186-3:2010

$102.76

Acoustics. Measurement of sound insulation in buildings and of building elements using sound intensity – Laboratory measurements at low frequencies

Published By Publication Date Number of Pages
BSI 2010 22
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1.1 General

This part of ISO 15186 specifies a sound intensity method to determine the sound reduction index and the element-normalized level difference of building elements at low frequencies. This method has significantly better reproducibility in a typical test facility than those of ISO 140-3, ISO 140-10 and ISO 15186-1. The results are more independent of the room dimensions of the laboratory and closer to values that would be measured between rooms of volume greater than 300 m3. This part of ISO 15186 is applicable in the frequency range 50 Hz to 160 Hz but is mainly intended for the frequency range 50 Hz to 80 Hz.

NOTE For elements faced with thick, porous absorbers, the recommended frequency range is 50 Hz to 80 Hz.

The main differences between the methods of ISO 15186-1 and ISO 15186-3 are that in ISO 15186-3

  1. the sound pressure level of the source room is measured close to the surface of the test specimen, and

  2. the surface opposite the test specimen in the receiving room is highly absorbing and converts the room acoustically into a duct with several propagating cross-modes above the lowest cut-on frequency.

The results found by the method of ISO 15186-3 can be combined with those of ISO 140-3 and ISO 15186-1 to produce data in the frequency range 50 Hz to 5 000 Hz.

1.2 Precision

The reproducibility of this intensity method is, for all frequencies, estimated to be equal to or better than that found with the method of ISO 140-3 at 100 Hz.

Some comparisons of data obtained with the methods of this part of ISO 15186 and ISO 140-3 are given in annex B.

PDF Catalog

PDF Pages PDF Title
3 TitlePage – Acoustics�— Measurement of sound insulation in buildings and of building elements usi…
5 TableofContent – Contents Page
6 Foreword – Foreword
7 Scope – 1��� Scope
Subclause2 – 1.1��� General
Subclause2 – 1.2��� Precision
NormativeReference – 2��� Normative references
10 Clause1 – 4��� Instrumentation
Subclause2 – 4.1��� General
11 Subclause2 – 4.2��� Calibration
Clause1 – 5��� Test arrangement
Subclause2 – 5.1��� Rooms
Subclause2 – 5.2��� Test specimen
12 Subclause2 – 5.3��� Mounting conditions
Clause1 – 6��� Test procedure
Subclause2 – 6.1��� General
Subclause2 – 6.2��� Generation of sound field
Subclause2 – 6.3��� Measurement of the average sound pressure level over the surface of the test …
13 Subclause2 – 6.4��� Measurement of the average sound intensity level on the receiving side
Subclause3 – 6.4.1��� Measurement surface
Subclause3 – 6.4.2��� Qualification of the measurement surface
Subclause3 – 6.4.3��� Scanning procedure
14 Subclause3 – 6.4.4��� Procedure for discrete positions
Subclause3 – 6.4.5��� One measurement area by scanning
15 Subclause3 – 6.4.6��� Several measurement sub-areas
Subclause2 – 6.5��� Background noise
16 Subclause2 – 6.6��� Frequency range of measurements
Clause1 – 7��� Expression of results
Clause1 – 8��� Test report
17 AnnexNormative – Qualification
Clause1 – A.1��� General
18 Clause1 – A.2��� Examples
19 AnnexInformative – Estimated precision of the method
20 Bibliography – Bibliography

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BS EN ISO 15186-3:2010
$102.76