EN ISO 7779:2010
(Main)Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment (ISO 7779:2010)
Acoustics - Measurement of airborne noise emitted by information technology and telecommunications equipment (ISO 7779:2010)
ISO 7779:2010 specifies procedures for measuring and reporting the noise emission of information technology and telecommunications equipment.
The basic emission quantity is the A-weighted sound power level which may be used for comparing equipment of the same type but from different manufacturers, or for comparing different equipment.
Three basic noise emission standards for determination of the sound power levels are specified in ISO 7779:2010 in order to avoid undue restriction on existing facilities and experience. ISO 3741 specifies comparison measurements in a reverberation test room; ISO 3744 and ISO 3745 specify measurements in an essentially free field over a reflecting plane. Any one of these three basic noise emission standards can be selected and used exclusively in accordance with ISO 7779:2010 when determining sound power levels of a machine.
The A-weighted sound power level is supplemented by the A-weighted emission sound pressure level determined at the operator position(s) or the bystander positions, based on basic noise emission standard ISO 11201. This sound pressure level is not a worker's immission rating level, but it can assist in identifying any potential problems that could cause annoyance, activity interference, or hearing damage to operators and bystanders.
Methods for determination of whether the noise emission includes prominent discrete tones or is impulsive in character are specified in annexes.
ISO 7779:2010 is suitable for type tests and provides methods for manufacturers and testing laboratories to obtain comparable results.
The methods specified in ISO 7779:2010 allow the determination of noise emission levels for a functional unit tested individually.
The procedures apply to equipment which emits broadband noise, narrowband noise and noise which contains discrete-frequency components, or impulsive noise.
The sound power and emission sound pressure levels obtained can serve noise emission declaration and comparison purposes (see ISO 9296).
If sound power levels obtained are determined for a number of functional units of the same production series, they can be used to determine a statistical value for that production series (see ISO 9296).
Akustik - Geräuschemissionsmessung an Geräten der Informations- und Telekommunikationstechnik (ISO 7779:2010)
Diese Internationale Norm legt Verfahren zur Messung und Angabe des Geräusches fest, das von Geräten der
Informations- und Telekommunikationstechnik abgestrahlt wird.
ANMERKUNG 1 Diese Internationale Norm gilt als Teil einer Geräuschmessnorm (siehe 3.1.2) für diese Art von
Geräten. Sie beruht auf den Geräuschemissions-Grundnormen (siehe 3.1.1) ISO 3741, ISO 3744, ISO 3745 und
ISO 11201.
Als Grundgröße dient der A-bewertete Schallleistungspegel, der zum Vergleich von Geräten derselben Bauart,
jedoch verschiedener Hersteller sowie zum Vergleich von unterschiedlichen Geräten herangezogen werden
kann.
In dieser Internationalen Norm werden drei Geräuschemissions-Grundnormen zur Bestimmung der Schallleistungspegel
festgelegt, um ungerechtfertigte Einschränkungen bezüglich vorhandener Prüfeinrichtungen und
Erfahrungen zu vermeiden. ISO 3741 beschreibt Vergleichsmessungen in einem Hallraum; ISO 3744 und
ISO 3745 beschreiben Messungen in einem im Wesentlichen freien Schallfeld über einer reflektierenden Ebene.
Jede dieser drei Geräuschemissions-Grundnormen kann ausgewählt und ausschließlich entsprechend dieser
Internationalen Norm für die Bestimmung der Schallleistungspegel einer Maschine angewandt werden.
Der A-bewertete Schallleistungspegel wird durch den A-bewerteten Emissions-Schalldruckpegel am Arbeitsplatz
(an Arbeitsplätzen) oder an Nachbararbeitsplätzen eines Gerätes ergänzt, die nach der Geräuschemissions-
Grundnorm ISO 11201 bestimmt werden. Letzterer ist zwar kein Beurteilungspegel der Geräuschbelastung
eines am Gerät Arbeitenden (Geräuschimmission), er kann aber bei der Suche nach möglichen Problemen
helfen, die zu einer Belästigung, Arbeitsbehinderung oder zu Hörschäden bei Bedienungspersonen oder an
Nachbararbeitsplätzen führen könnten.
In den Anhängen D und E sind Verfahren festgelegt, nach denen bestimmt werden kann, ob die Geräuschemission
deutliche Einzeltöne oder Impulsanteile enthält.
Acoustique - Mesurage du bruit aérien émis par les équipements liés aux technologies de l'information et aux télécommunications (ISO 7779:2010)
L'ISO 7779:2010 spécifie des procédures de mesurage et d'indication de l'émission sonore des équipements liés aux technologies de l'information et aux télécommunications.
La grandeur fondamentale d'émission sonore est le niveau de puissance acoustique pondéré A qui peut être utilisé pour la comparaison d'équipements de même type mais de fabricants différents, ou pour la comparaison de différents équipements.
Trois normes de base, relatives à l'émission sonore, permettant de déterminer les niveaux de puissance acoustique, sont spécifiées dans l'ISO 7779:2010 de façon à éviter une restriction excessive des installations et des pratiques existantes. L'ISO 3741 spécifie les mesurages de comparaison dans une salle d'essai réverbérante; l'ISO 3744 et l'ISO 3745 spécifient les mesurages dans les conditions approchant celles du champ libre au-dessus d'un plan réfléchissant. L'une ou l'autre de ces trois normes de base relatives à l'émission sonore peut être sélectionnée et utilisée exclusivement conformément à l'ISO 779:2010 lors de la détermination des niveaux de puissance acoustique d'une machine.
Le niveau de puissance acoustique pondéré A est complété par le niveau de pression acoustique d'émission pondéré A déterminé à la (aux) position(s) d'opérateur ou aux positions d'assistant, par rapport à la norme de base relative à l'émission sonore ISO 11201. Ce niveau de pression acoustique n'est pas un niveau d'évaluation d'immission du travailleur, mais peut être utile à l'identification de tout problème potentiel pouvant engendrer un désagrément, une interférence avec l'activité, ou des lésions auditives aux opérateurs et assistants.
Les méthodes permettant de déterminer si l'émission sonore comporte des composantes tonales émergentes, ou si elle présente un caractère impulsionnel, sont spécifiées dans les Annexes D et E, respectivement.
L'ISO 7779:2010 convient aux essais de type et fournit des méthodes pour les fabricants et les laboratoires d'essais permettant d'obtenir des résultats comparables.
Les méthodes spécifiées dans l'ISO 7779:2010 permettent la détermination de niveaux d'émission sonore pour une unité fonctionnelle testée individuellement.
Les procédures sont applicables à l'équipement qui émet un bruit à large bande, un bruit à bande étroite, un bruit à composantes tonales, ou un bruit impulsionnel.
Les niveaux de puissance acoustique et de pression acoustique d'émission obtenus peuvent servir aux besoins de déclaration d'émission sonore et aux fins de comparaison (voir ISO 9296).
Si les niveaux de puissance acoustique obtenus sont déterminés pour un certain nombre d'unités fonctionnelles de la même série de production, ils peuvent être utilisés pour déterminer une valeur statistique pour cette même série (voir l'ISO 9296).
Akustika - Merjenje zračnega hrupa informacijske tehnologije in telekomunikacijske opreme (ISO 7779:2010)
Ta mednarodni standard določa postopke za merjenje in poročanje o emisijah hrupa informacijske tehnologije in telekomunikacijske opreme. Osnovna količina emisij je A-utežena raven moči zvoka, ki se lahko uporablja za primerjavo opreme istega tipa, vendar od različnih proizvajalcev, ali za primerjavo različne opreme. V tem mednarodnem standardu so določeni trije osnovni standardi emisij hrupa za ugotavljanje ravni moči zvoka, z namenom izogniti se nepotrebnim omejitvam obstoječih možnosti in izkušenj. ISO 3741 določa ukrepe za primerjavo v odmevnicah; ISO 3744 in ISO 3745 določata ukrepe na v osnovi prostem polju nad odbojno ravnino. Kateri koli izmed teh treh osnovnih standardov za emisije hrupa se lahko izbere in uporabi izključno v skladu s tem mednarodnim standardom, kadar se ugotavljajo ravni moči zvoka stroja. A-utežena raven moči zvoka je nadomeščena z A-uteženo ravnijo emisij zvočnega tlaka, ugotovljeno s strani operaterjev ali drugih navzočih oseb, osnovano na osnovnem standardu o emisijah hrupa ISO 11201. Ta raven zvočnega tlaka ni delavčeva ocenjena raven emisije, vendar lahko pomaga pri prepoznavanju kakršnih koli potencialnih problemov, ki bi lahko povzročili nevšečnosti, motenje dejavnosti ali poškodbo sluha za operaterje ali druge navzoče osebe. Metode za ugotavljanje ali emisije hrupa vključujejo izrazito diskretne tone in ali so nenadne so opredeljene v Dodatkih D in E v tem vrstnem redu. Ta mednarodni standard je primeren za tipska preskušanja in predpisuje metode za proizvajalce in preskusne laboratorije, s katerimi se pridobijo primerljivi rezultati. Metoda, opredeljena v tem mednarodnem standardu, omogoča ugotavljanje ravni emisij hrupa za funkcionalno enoto (glej točko 3.1.4.), ki se preskuša posamično. Postopki veljajo za opremo, ki oddaja širokopasovni hrup, ozkopasovni hrup in hrup, ki vsebuje komponente diskretnih frekvenc ali nenadni hrup. Pridobljene ravni moči zvoka in emisije zvočnega tlaka lahko služijo za namene deklariranja emisij in primerjanja (glej ISO 9296). Če so pridobljene ravni moči zvoka določene za več funkcionalnih enot iste proizvodne serije, se lahko uporabijo za določevanje statistične vrednosti te proizvodne serije (glej ISO 9296).
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2010
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SIST EN ISO 7779:2002
SIST EN ISO 7779:2002/A1:2004
SIST EN ISO 7779:2002/oprA2:2006
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Acoustics - Measurement of airborne noise emitted by information technology and
telecommunications equipment (ISO 7779:2010)
Akustik - Geräuschemissionsmessung an Geräten der Informations- und
Telekommunikationstechnik (ISO 7779:2010)
Acoustique - Mesurage du bruit aérien émis par les équipements liés aux technologies
de l'information et aux télécommunications (ISO 7779:2010)
Ta slovenski standard je istoveten z: EN ISO 7779:2010
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
35.020 Informacijska tehnika in Information technology (IT) in
tehnologija na splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 7779
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2010
ICS 17.140.20; 35.020 Supersedes EN ISO 7779:2001
English Version
Acoustics - Measurement of airborne noise emitted by
information technology and telecommunications equipment (ISO
7779:2010)
Acoustique - Mesurage du bruit aérien émis par les Akustik - Geräuschemissionsmessung an Geräten der
équipements liés aux technologies de l'information et aux Informations- und Telekommunikationstechnik (ISO
télécommunications (ISO 7779:2010) 7779:2010)
This European Standard was approved by CEN on 26 July 2010.
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, Croatia, 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
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7779:2010: E
worldwide for CEN national Members.
Contents Page
Foreword .3
Foreword
This document (EN ISO 7779:2010) has been prepared by Technical Committee ISO/TC 43 "Acoustics" in
collaboration with 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 7779:2001.
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, Croatia, 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 7779:2010 has been approved by CEN as a EN ISO 7779:2010 without any modification.
INTERNATIONAL ISO
STANDARD 7779
Third edition
2010-08-15
Acoustics — Measurement of airborne
noise emitted by information technology
and telecommunications equipment
Acoustique — Mesurage du bruit aérien émis par les équipements liés
aux technologies de l'information et aux télécommunications
Reference number
ISO 7779:2010(E)
©
ISO 2010
ISO 7779:2010(E)
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ii © ISO 2010 – All rights reserved
ISO 7779:2010(E)
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.2
3 Terms and definitions .2
4 Conformity requirements.6
5 Installation and operating conditions .6
6 Method for determination of sound power levels of equipment in reverberation test rooms .9
7 Method for determination of sound power levels of equipment under essentially free-field
conditions over a reflecting plane .15
8 Method for determination of emission sound pressure levels at defined operator and
bystander positions .20
9 Information to be recorded and reported.27
Annex A (normative) Test accessories.32
Annex B (normative) Measurement surfaces.35
Annex C (normative) Installation and operating conditions for specific equipment categories.40
Annex D (informative) Identification and evaluation of prominent discrete tones .41
Annex E (informative) Detection of impulsive noise .59
Bibliography.61
ISO 7779:2010(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 7779 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise.
This third edition cancels and replaces the second edition (ISO 7779:1999), which has been technically
revised. It also incorporates the amendment, ISO 7779:1999/Amd.1:2003.
iv © ISO 2010 – All rights reserved
ISO 7779:2010(E)
Introduction
This International Standard specifies methods for the measurement of airborne noise emitted by information
technology and telecommunications (ITT) equipment. Hitherto, a wide variety of methods have been applied
by individual manufacturers and users to satisfy particular equipment or application needs. These diverse
practices have, in many cases, made comparison of noise emission difficult. This International Standard
simplifies such comparisons and is the basis for the declaration of the noise emission levels of ITT equipment.
In order to ensure accuracy, validity and acceptability, this International Standard is based on the basic
International Standards for determination of the sound power level and for determination of the emission
sound pressure level at the operator position(s) and bystander position(s). Furthermore, implementation is
simplified by conformity with these International Standards.
In many cases, free-field conditions over a reflecting plane are realised by hemi-anechoic rooms. These
rooms may be particularly useful during product design to locate and to improve individual contributing noise
sources. Reverberation rooms may be more economical for production control and for obtaining sound power
levels for noise emission declaration purposes.
The method for measuring the emission sound pressure level at the operator or bystander positions (based on
ISO 11201) is specified in a separate clause, as this level is not considered to be primary noise emission
declaration information. The measurements can, however, be carried out in conjunction with those for sound
power determination in a free field over a reflecting plane.
For comparison of similar equipment, it is essential that the installation conditions and mode of operation be
the same. In Annex C these parameters are standardized for many categories of equipment.
This International Standard is based on ECMA-74.
INTERNATIONAL STANDARD ISO 7779:2010(E)
Acoustics — Measurement of airborne noise emitted by
information technology and telecommunications equipment
1 Scope
This International Standard specifies procedures for measuring and reporting the noise emission of
information technology and telecommunications equipment.
NOTE 1 This International Standard is considered part of a noise test code (see 3.1.2) for this type of equipment, and
is based on basic noise emission standards (see 3.1.1) ISO 3741, ISO 3744, ISO 3745 and ISO 11201.
The basic emission quantity is the A-weighted sound power level which may be used for comparing
equipment of the same type but from different manufacturers, or for comparing different equipment.
Three basic noise emission standards for determination of the sound power levels are specified in this
International Standard in order to avoid undue restriction on existing facilities and experience. ISO 3741
specifies comparison measurements in a reverberation test room; ISO 3744 and ISO 3745 specify
measurements in an essentially free field over a reflecting plane. Any one of these three basic noise emission
standards can be selected and used exclusively in accordance with this International Standard when
determining sound power levels of a machine.
The A-weighted sound power level is supplemente
...
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