NF EN ISO 15186-3

NF EN ISO 15186-3

August 2011
Standard Current

Acoustics - Measurement of sound insulation in buildings and of building elements using sound intensity - Part 3 : laboratory measurements at low frequencies

ISO 15186-3:2002 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. ISO 15186-3 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 the sound pressure level of the source room is measured close to the surface of the test specimen, andthe 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. 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 this part of ISO 15186 and with ISO 140-3 are given for information.

See more
View the extract
Main informations

Collections

National standards and national normative documents

Publication date

August 2011

Number of pages

21 p.

Reference

NF EN ISO 15186-3

ICS Codes

91.120.20   Acoustics in building. Sound insulation

Classification index

S31-098-3

Print number

1 - 20/07/2011

International kinship

ISO 15186-3:2002

European kinship

EN ISO 15186-3:2010
Sumary
Acoustics - Measurement of sound insulation in buildings and of building elements using sound intensity - Part 3 : laboratory measurements at low frequencies

ISO 15186-3:2002 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. ISO 15186-3 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.

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 this part of ISO 15186 and with ISO 140-3 are given for information.

Table of contents
View the extract
  • Avant-propos
    iv
  • 1 Domaine d'application
    1
  • 1.1 Généralités
    1
  • 1.2 Fidélité
    1
  • 2 Références normatives
    1
  • 3 Termes et définitions
    2
  • 4 Appareillage
    5
  • 4.1 Généralités
    5
  • 4.2 Étalonnage
    5
  • 5 Dispositif d'essai
    6
  • 5.1 Salles
    6
  • 5.2 Éprouvette
    6
  • 5.3 Conditions de montage
    6
  • 6 Mode opératoire d'essai
    6
  • 6.1 Généralités
    6
  • 6.2 Génération du champ acoustique
    6
  • 6.3 Mesure du niveau moyen de pression acoustique à la surface de l'éprouvette dans la salle d'émission
    7
  • 6.4 Mesure du niveau moyen d'intensité du côté réception
    7
  • 6.5 Bruit de fond
    10
  • 6.6 Gamme de fréquences des mesurages
    10
  • 7 Expression des résultats
    11
  • 8 Rapport d'essai
    11
  • Annexe A (normative) Qualification
    12
  • Annexe B (informative) Estimation de la fidélité de la méthode
    14
  • Bibliographie
    15
ZOOM ON ... the Requirements department
To comply with a standard, you need to quickly understand its issues in order to determine its impact on your activity.

The Requirements department helps you quickly locate within the normative text:
- mandatory clauses to satisfy,
- non-essential but useful clauses to know, such as permissions and recommendations.

The identification of these types of clauses is based on the document “ISO / IEC Directives, Part 2 - Principles and rules of structure and drafting of ISO documents ”as well as on a constantly enriched list of verbal forms.

With Requirements, quickly access the main part of the normative text!

With Requirements, quickly access the main part of the normative text!
Need to identify, monitor and decipher standards?

COBAZ is the simple and effective solution to meet the normative needs related to your activity, in France and abroad.

Available by subscription, CObaz is THE modular solution to compose according to your needs today and tomorrow. Quickly discover CObaz!

Request your free, no-obligation live demo

I discover COBAZ