EN 60704-2-7:1998

SLOVENSKI STANDARD
01-februar-2001
Household and similar electrical appliances - Test code for the determination of
airborne acoustical noise - Part 2: Particular requirements for fans
Household and similar electrical appliances - Test code for the determination of airborne
acoustical noise -- Part 2: Particular requirements for fans
Elektrische Geräte für den Hausgebrauch und ähnliche Zwecke - Prüfvorschrift für die
Bestimmung der Luftschallemission -- Teil 2: Besondere Bestimmungen für Lüfter
Appareils électrodomestiques et analogues - Code d'essai pour la détermination du bruit
aérien -- Partie 2: Règles particulières pour les ventilateurs
Ta slovenski standard je istoveten z: EN 60704-2-7:1998
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.

NORME
CEI
INTERNATIONALE
IEC
60704-2-7
INTERNATIONAL
Première édition
STANDARD
First edition
1997-09
Appareils électrodomestiques et analogues –
Code d'essai pour la détermination
du bruit aérien –
Partie 2:
Règles particulières pour les ventilateurs
Household and similar electrical appliances –
Test code for the determination
of airborne acoustical noise –
Part 2:
Particular requirements for fans
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60704-2-7 © IEC:1997 – 3 –
CONTENTS
Page
FOREWORD . 5
INTRODUCTION . 7
Clause
1 Scope and object . 9
2 Normative references. 11
3 Terms and definitions. 11
4 Measurement methods and acoustical environments . 11
5 Instrumentation . 13
6 Operation and location of appliances under test. 13
7 Measurement of sound pressure levels. 15
8 Calculation of sound pressure and sound power levels . 17
9 Information to be recorded . 17
10 Information to be reported . 17
Figure 101. 19
Annexes
A Guidelines for the design of simple test rooms with essentially free-field conditions . 21
B Standard test table. 21

60704-2-7 © IEC:1997 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
TEST CODE FOR THE DETERMINATION OF
AIRBORNE ACOUSTICAL NOISE –
Part 2: Particular requirements for fans
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization
for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60704-2-7 has been prepared by of IEC technical committee 59:
Performance of household electrical appliances.
The text of this standard is based on the following documents:
FDIS Report on voting
59/179/FDIS 59/189/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This Part 2 is intended to be used in conjunction with IEC 60704-1, second edition, 1997:
Household and similar electrical appliances – Test code for the determination of airborne
acoustical noise – Part 1: General requirements.
The relevant text of Part 1 as amended by this standard establishes the test code for fans.
This Part 2 supplements or modifies the corresponding clauses in IEC 60704-1. When a
particular subclause of Part 1 is not mentioned in this Part 2, that subclause applies as far as is
reasonable. Where this standard states "addition", "modification" or "replacement", the relevant
requirement, test specification or explanatory matter in Part 1 should be adapted accordingly.
Subclauses or figures which are additional to those in Part 1 are numbered starting from 101.
Additional annexes are lettered AA, BB, etc.

60704-2-7 © IEC:1997 – 7 –
INTRODUCTION
The measuring conditions specified in this Part 2 provide for sufficient accuracy in determining
the noise emitted, and the comparison of the results of measurements taken by different
laboratories, whilst simulating as far as possible the practical use of household fans.
It is recommended to consider the determination of noise levels as part of a comprehensive
testing procedure covering many aspects of the properties and performance of household fans.
NOTE – As stated in the introduction to IEC 60704-1, this test code is concerned with airborne noise only.

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