EN ISO 5136:2009

Acoustics - Determination of sound power radiated into a duct by fans and other air-moving devices - In-duct method (ISO 5136:2003)

ISO 5136 specifies a method for testing ducted fans and other air-moving devices to determine the sound power radiated into an anechoically terminated duct on the inlet and/or outlet side of the equipment.
The method is applicable to fans which emit steady, broad-band, narrow-band and discrete-frequency sound and to air temperatures between - 50 °C and + 70 °C. The test duct diameter range is from 0,15 m to 2 m. Test methods for small (d < 0,15 m) and large (d > 2 m) test ducts are described in the informative annexes H and I, respectively.
The maximum mean flow velocity at the microphone head for which the method is suitable, depends on the type of microphone shield used, and is as follows:
foam ball 15 m/s; nose cone 20 m/s; sampling tube 40 m/s.
Above these values the suppression of turbulent pressure fluctuations by the microphone shield may be insufficient.
The method described in ISO 5136 is applicable to a sound source in which a fan is connected to ducts on at least one side. It is also applicable to other fan/attenuator combinations or equipment incorporating fans which can be considered as "black boxes".
Examples of fans and other equipment covered by ISO 5136 are
ducted centrifugal fans, ducted axial flow fans, ducted mixed-flow fans, ducted air-handling units, ducted dust-collection units, ducted air-conditioning units, and ducted furnaces.
ISO 5136 is also applicable to other aerodynamic sources such as boxes, dampers and throttle devices provided that a quiet air flow delivered by an auxiliary fan is available, and the signal-to-noise ratio of sound pressures to turbulent pressure fluctuations in the test duct is at least 6 dB.
It is not applicable to non-ducted fans or equipment.

Akustik - Bestimmung der von Ventilatoren und anderen Strömungsmaschinen in Kanäle abgestrahlten Schallleistung - Kanalverfahren (ISO 5136:2003)

1.1 Allgemeines
Diese Internationale Norm legt ein Verfahren zur Bestimmung der Schallleistung fest, die von kanalgebundenen
Ventilatoren und anderen Strömungsmaschinen in einen reflexionsarm endenden Kanal ansaugund/
oder ausblasseitig abgestrahlt werden.
ANMERKUNG 1 Der Einfachheit halber steht der Begriff „Ventilator“ im nachfolgenden Text für „Ventilator oder andere
Strömungsmaschine“.
Das Verfahren ist auf Ventilatoren anwendbar, die breitbandigen, schmalbandigen oder tonalen Dauerschall
aussenden. Sie gilt für Lufttemperaturen von −50 °bis +70 C. Der Bereich der Messkanaldurchmesser
erstreckt sich von 0,15 m bis 2 m. Messverfahren für kleinere (d < 0,15 m) und größere (d > 2 m) Messkanäle
sind in den informativen Anhängen H bzw. I beschrieben.
Die höchstzulässige mittlere Strömungsgeschwindigkeit am Mikrofonkopf, bei der das Verfahren anwendbar
ist, hängt folgendermaßen von der Art des Mikrofonwindschirms ab:
- Schaumstoff-Windball: 15 m/s
- Nasenkonus: 20 m/s
- Schlitzrohrsonde: 40 m/s
Oberhalb dieser Werte kann die Unterdrückung durch Turbulenz am Mikrofon verursachter Druckschwankungen
durch den Mikrofonwindschirm (siehe 3.9) unzureichend sein.
Es wird erwartet, dass Schallleistungsmessungen im Zusammenhang mit Luftstromleistungsmessungen nach
ISO 5801 durchgeführt werden. Die Kanalanordnung wird daher normalerweise einen sternförmigen
Strömungsgleichrichter auf der Ausblasseite des Ventilators aufweisen, der drallmindernd wirkt (siehe 7.3).
Wo es zulässig ist, auf den Gleichrichter zu verzichten, z. B. bei großen Ventilatoren der Einbaukategorie C
nach ISO 5801:1997, beträgt der höchstzulässige Drallwinkel 15°. (Ein Beispiel für ein Verfahren zur Bestimmung
des Drallwinkels ist Anhang J zu entnehmen.)
ANMERKUNG 2 Die in ISO 5801 definierten Einbaukategorien besagen, dass der Ventilator entweder nur ausblasseitig
(Kategorie B), nur ansaugseitig (Kategorie C) oder ausblas- und ansaugseitig (Kategorie D) mit einem Kanal verbunden
ist.

Acoustique - Détermination de la puissance acoustique rayonnée dans un conduit par des ventilateurs et d'autres systèmes de ventilation - Méthode en conduit (ISO 5136:2003)

L'ISO 5136 prescrit une méthode d'essais des ventilateurs et autres systèmes de ventilation en conduit, en vue de déterminer la puissance acoustique rayonnée dans un conduit ayant une terminaison anéchoïque à l'aspiration et/ou au refoulement.
La méthode est applicable aux ventilateurs qui émettent des bruits stables à large bande, à bande étroite et à fréquence discrète. Elle s'applique pour des températures d'air comprises entre - 50 °C et + 70 °C. Le diamètre du conduit de mesurage est compris entre 0,15 m et 2 m. Les méthodes de mesurage qui s'appliquent aux conduits de mesurage de petite (d < 0,15 m) et de grande (d > 2 m) taille sont fournies respectivement dans les annexes H et I.
La vitesse maximale de l'écoulement moyen au droit du microphone pour l'application de la méthode dépend du type de protection utilisé. Cette protection peut être l'un des trois dispositifs suivants :
boule antivent 15 m/s ;
ogive antivent 20 m/s ;
sonde microphonique 40 m/s.
Au-delà de ces valeurs, l'atténuation des fluctuations de pression turbulente par la protection microphonique peut s'avérer insuffisante.
La source de bruit à laquelle s'applique la méthode décrite dans l'ISO 5136 est un ventilateur dont au moins une ouïe est raccordée à un conduit. Elle peut également s'appliquer à d'autres dispositifs combinant un ventilateur et un atténuateur, ou à des équipements intégrant des ventilateurs pouvant être assimilés à des « boîtes noires ».
Exemples de ventilateurs et d'équipements concernés par l'ISO 5136 :
ventilateurs centrifuges à enveloppe,
ventilateurs hélicoïdes à enveloppe,
ventilateurs mixtes à enveloppe,
centrales de traitement d'air raccordées,
dépoussiéreurs raccordés,
unités de conditionnement d'air raccordées, et
fours raccordés.
L'ISO 5136 est également applicable à d'autres sources aérodynamiques telles que plénums, registres et dispositifs de réglage de débit, sous réserve que passe un courant d'air discret induit par un ventilateur auxiliaire, et à condition que le rapport signal/bruit des pressions acoustiques sur les fluctuations de pression turbulente dans le conduit de mesurage soit d'au moins 6 dB.
Elle ne s'applique pas aux ventilateurs ou équipements qui ne sont pas raccordés à un conduit.

Akustika - Določanje zvočne moči, ki jo v kanal sevajo ventilator in drugi stroji za transport zraka - Metoda za merjenje v kanalu (ISO 5136:2003)

General Information

• Status: Published
• Publication Date: 04-Aug-2009
• Withdrawal Date: 27-Feb-2010
• ICS: 17.140.20 - Noise emitted by machines and equipment
• ICS: 23.120 - Ventilators. Fans. Air-conditioners
• Technical Committee: CEN/TC 211 - Acuostics
• Drafting Committee: CEN/TC 211 - Acuostics
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 05-Aug-2009
• Due Date: 25-Sep-2010
• Completion Date: 05-Aug-2009
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Directive: 89/106/EEC - Construction products
• Directive: 98/37/EC - Machinery
• Mandate: M/BC/CEN/88/13 - Standardization request to CEN/CENELEC relating to machinery
• Ref Project: SIST EN ISO 5136:2009 - Acoustics - Determination of sound power radiated into a duct by fans and other air-moving devices - In-duct method (ISO 5136:2003)

Relations

• Replaces: EN ISO 5136:2003 - Acoustics - Determination of sound power radiated into a duct by fans and other air-moving devices - In-duct method (ISO 5136:2003)
• Effective Date: 08-Aug-2009

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2009
1DGRPHãþD
SIST EN ISO 5136:2004
$NXVWLND'RORþDQMH]YRþQHPRþLNLMRYNDQDOVHYDMRYHQWLODWRULQGUXJLVWURML]D
WUDQVSRUW]UDND0HWRGD]DPHUMHQMHYNDQDOX,62
Acoustics - Determination of sound power radiated into a duct by fans and other air-
moving devices - In-duct method (ISO 5136:2003)
Akustik - Bestimmung der von Ventilatoren und anderen Strömungsmaschinen in Kanäle
abgestrahlten Schallleistung - Kanalverfahren (ISO 5136:2003)
Acoustique - Détermination de la puissance acoustique rayonnée dans un conduit par
des ventilateurs et d'autres systèmes de ventilation - Méthode en conduit (ISO
5136:2003)
Ta slovenski standard je istoveten z: EN ISO 5136:2009
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
23.120 =UDþQLNL9HWUQLNL.OLPDWVNH Ventilators. Fans. Air-
QDSUDYH conditioners
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 5136
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2009
ICS 17.140.20; 23.120 Supersedes EN ISO 5136:2003
English Version
Acoustics - Determination of sound power radiated into a duct by
fans and other air-moving devices - In-duct method (ISO
5136:2003)
Acoustique - Détermination de la puissance acoustique Akustik - Bestimmung der von Ventilatoren und anderen
rayonnée dans un conduit par des ventilateurs et d'autres Strömungsmaschinen in Kanäle abgestrahlten
systèmes de ventilation - Méthode en conduit (ISO Schallleistung - Kanalverfahren (ISO 5136:2003)
5136:2003)
This European Standard was approved by CEN on 20 July 2009.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5136:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC .4
Annex ZB (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC .5

Foreword
The text of ISO 5136:2003 has been prepared by Technical Committee ISO/TC 43 “Acoustics” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 5136:2009 by
Technical Committee CEN/TC 211 “Acoustics” the secretariat of which is held by DS.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by February 2010, and conflicting national standards shall be withdrawn
at the latest by February 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 5136:2003.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EC Directives.
For relationship with EC Directives, see informative Annexes ZA and ZB, which are integral parts of this
document.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 5136:2003 has been approved by CEN as a EN ISO 5136:2009 without any modification.
Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a means of conforming to Essential Requirements of the
New Approach Directive 98/37/EC, amended by 98/79/EC on machinery.
Once this standard is cited in the Official Journal of the European Communities under that Directive and has
been implemented as a national standard in at least one Member State, compliance with the normative
clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity
with the relevant Essential Requirements of that Directive and associated EFTA regulations.
WARNING - Other requirements and other EU Directives may be applicable to the product(s) falling within the
scope of this standard.
Annex ZB
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a means of conforming to Essential Requirements of the
New Approach Directive 2006/42/EC on machinery.
Once this standard is cited in the Official Journal of the European Communities under that Directive and has
been implemented as a national standard in at least one Member State, compliance with the normative
clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity
with the relevant Essential Requirements of that Directive and associated EFTA regulations.
WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling within
the scope of this standard.
INTERNATIONAL ISO
STANDARD 5136
Second edition
2003-04-01
Acoustics — Determination of sound
power radiated into a duct by fans and
other air-moving devices — In-duct
method
Acoustique — Détermination de la puissance acoustique rayonnée
dans un conduit par des ventilateurs et d'autres systèmes de
ventilation — Méthode en conduit

Reference number
ISO 5136:2003(E)
©
ISO 2003
ISO 5136:2003(E)
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ISO 5136:2003(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
1.1 General. 1
1.2 Types of sound source. 1
2 Normative references . 2
3 Terms, definitions and symbols . 2
4 Uncertainty of the measurement method.7
5 Test facilities and instrumentation. 8
5.1 General requirements . 8
5.2 Duct specifications . 9
5.3 Instrumentation . 16
5.4 System calibration . 19
6 Test arrangement . 20
6.1 Sampling tube mounting. 20
6.2 Microphone position. 20
6.3 Operating condition control equipment .21
7 Test procedure . 21
7.1 Operating conditions . 21
7.2 Sound pressure level readings. 21
7.3 Measurements with and without flow straightener on the outlet side . 22
7.4 Inlet side measurements — Large fans: installation category D (according to
ISO 5801:1997). 22
8 Calculations. 23
8.1 Average sound pressure level. 23
8.2 Sound power level . 23
9 Information to be recorded . 24
10 Information to be reported . 24
Annex A (normative) Determination of the combined mean flow velocity and modal correction
C . 25
3,4
Annex B (normative) Determination of the signal-to-noise ratio of sound vs. turbulent pressure
fluctuation in the test duct . 31
Annex C (normative) Computational procedures for calculating the A-weighted sound power level
from one-third-octave-band sound power levels. 34
Annex D (informative) Example of calculation of C for a given duct diameter and mean flow
3,4
...