EN 62585:2012
(Main)Electroacoustics - Methods to determine corrections to obtain the free-field response of a sound level meter
Electroacoustics - Methods to determine corrections to obtain the free-field response of a sound level meter
IEC 62585:2012 provides information on the corrections required over a range of frequencies in order for a periodic test of a sound level meter to be performed according to IEC 61672-3. These corrections include; corrections for the typical effects of reflections from the case of the sound level meter and diffraction of sound around the microphone; corrections for the deviation of the typical microphone frequency response from a uniform frequency response, where the actual microphone response cannot be measured; and corrections for the influence on the frequency response of a typical microphone of a specified windscreen and any other accessory that is part of the configuration for normal use of the particular sound level meter submitted for testing. This International Standard includes discussion about uncertainties of measurement of the required corrections. In some instances a maximum permitted expanded uncertainty for the manufacturer or testing laboratory is given. The aim of this International Standard is to ensure that the adjustment value at the calibration check frequency and all corrections are determined using consistent and appropriate methods. It is intended that this International Standard will be used by manufacturers to determine adjustment values and corrections, by laboratories performing pattern evaluation tests according to IEC 61672-2, and by laboratories performing periodic tests according to IEC 61672-3. Laboratories performing periodic tests according to IEC 61672-3 will also need to consult this International Standard to ensure that the expanded uncertainties of measurement for the corrections quoted by the manufacturer do not exceed the maximum permitted values.
Elektroakustik - Verfahren zur Ermittlung von Korrekturwerten für die Bestimmung des Freifeld-Frequenzgangs eines Schallpegelmessers
Électroacoustique - Méthode de détermination de corrections pour obtenir la réponse en champ libre d'un sonomètre
La CEI 62585:2012 donne des informations relatives aux corrections exigées sur une plage de fréquences pour effectuer un essai périodique d'un sonomètre conformément à la CEI 61672-3. Ces corrections comportent; des corrections pour les effets typiques des réflexions par le boîtier du sonomètre et la diffraction du son autour du microphone; des corrections pour l'écart de la réponse en fréquence type du microphone par rapport à une réponse en fréquence uniforme, lorsque la réponse du microphone réel ne peut pas être mesurée; et des corrections pour l'influence sur la réponse en fréquence d'un microphone type d'un écran anti-vent spécifié ou de tout autre accessoire intégré dans la configuration pour usage normal du sonomètre spécifique soumis aux essais. La présente Norme internationale comporte une discussion relative aux incertitudes de mesure des corrections exigées. Dans certains cas, une incertitude élargie maximale admissible pour le fabricant ou le laboratoire d'essais est fournie. L'objectif de la présente Norme internationale est de garantir que la valeur de réglage à la fréquence de vérification d'étalonnage ainsi que toutes les corrections, sont déterminées en utilisant des méthodes cohérentes et appropriées. La présente Norme internationale est destinée à être utilisée par les fabricants pour déterminer les valeurs de réglage et les corrections, par les laboratoires effectuant des essais d'évaluation de modèle selon la CEI 61672-2 et par les laboratoires effectuant des essais périodiques conformément à la CEI 61672-3. Les laboratoires effectuant des essais périodiques selon la CEI 61672-3 auront également besoin de consulter la présente Norme internationale pour garantir que les incertitudes de mesure élargies pour les corrections indiquées par le fabricant ne dépassent pas les valeurs maximales admises.
Elektroakustika - Metode za določanje popravkov zaradi zagotovitve odzivanja merilnika zvočne ravni v odprtem prostoru
Ta mednarodni standard podaja informacije o popravkih, ki so potrebni za obseg frekvenc, da se lahko opravi redni preskus merilnika ravni glasnosti v skladu s standardom IEC 61672-3. Ti popravki vsebujejo: - popravke za značilne učinke odbojev iz ohišja merilnika ravni glasnosti in loma zvoka okoli mikrofona; - popravke za odstope značilnega frekvenčnega odziva mikrofona od enotnega frekvenčnega odziva, kjer dejanskega frekvenčnega odziva mikrofona ni mogoče izmeriti; - popravke za vpliv značilnega mikrofona na frekvenčni razpon pri uporabi določenega filtra za mikrofon ali drugih dodatkov, ki so del konfiguracije pri normalni uporabi določenega merilnika ravni glasnosti, ki je bil določen za testiranje. Ta mednarodni standard vsebuje razpravo o nezanesljivostih pri meritvah z zahtevanimi popravki. V nekaterih primerih je podana največja dovoljena razširjena nezanesljivost za proizvajalca ali testni laboratorij. Ta največja dovoljena razširjena nezanesljivost izključuje vse komponente zaradi spremenljivosti različnih vzorcev artefaktov (na primer mikrofona ali filtra za mikrofon). Treba je opozoriti, da če so navedene velike nezanesljivosti meritev za vsakega od posameznih popravkov in če združene odgovarjajo za konfiguracijo testiranega merilnika ravni glasnosti, potem te velike nezanesljivosti morda ne bodo v skladu z največjimi dovoljenimi razširjenimi nezanesljivostmi pri merjenju, ki so podane v tabeli A.1 v standardu IEC 61672-1:-1, in povzročijo neujemanje merilnika ravni glasnosti s standardom IEC 61672-1. Ta mednarodni standard tudi opisuje metode za določanje teh popravkov na želenem frekvenčnem območju in razloži nastavljivo vrednost na frekvenci za preverjanje kalibracije, ki jo bo navedel proizvajalec merilnika ravni glasnosti (zahteva ga tudi standard IEC 61672-3). Ko proizvajalec merilnika ravni glasnosti priporoča uporabo kalibratorja zvoka, primerjalne sponke ali elektrostatičnega sprožila za periodično testiranje akustičnega odziva merilnika ravni glasnosti pri različnih frekvencah, ta mednarodni standard opisuje metode merjenja popravkov, ki so potrebni, da se označba na merilniku ravni glasnosti prilagodi ustrezni ravni v odprtem prostoru pri izbranemu frekvenčnemu obsegu. Ti popravki veljajo za določen model kalibratorja zvoka, primerjalne sponke ali elektrostatičnega sprožila, mikrofona in merilnika ravni glasnosti (zahteva ga tudi standard IEC 61672-3). Cilj tega mednarodnega standarda je, da zagotovi konsistentne in primerne metode določanja nastavljive vrednosti na frekvenci za preverjanje kalibracije in vseh popravkov. Ta mednarodni standard je namenjen proizvajalcem, da ugotovijo nastavljive vrednosti in popravke s pomočjo laboratorijev, ki izvajajo teste ocene vzorcev v skladu s standardom IEC 61672-2 in periodične teste v skladu s standardom IEC 61672-3. Laboratoriji, ki izvajajo periodične teste v skladu s standardom IEC 61672-3, bodo morali tudi upoštevati ta mednarodni standard, da lahko zagotovijo, da razširjene nezanesljivosti merjenja za popravke, ki jih navaja proizvajalec, ne presežejo največjih dovoljenih vrednosti. Popravki, pridobljeni z uporabo metod iz tega mednarodnega standarda, so rezultat merjenja z uporabo vzorcev naprav. Mogoče je, da ti popravki niso popolnoma reprezentativni bodisi za vse proizvedene serije bodisi v daljšem časovnem obdobju. Priporočeno je, da meritve ponavljate v rednih presledkih, da ni potrebno spreminjati popravkov, ki so navedeni v priročniku z navodili. Ta mednarodni standard ne pokriva določenih ohišij, ki imajo na merilniku ravni glasnosti pritrjen mikrofon, ki se uporablja za zvočna polja naključne pojavnosti. Te informacije so podane v standardu IEC 61183.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2012
(OHNWURDNXVWLND0HWRGH]DGRORþDQMHSRSUDYNRY]DUDGL]DJRWRYLWYHRG]LYDQMD
PHULOQLND]YRþQHUDYQLYRGSUWHPSURVWRUX
Electroacoustics - methods to determine corrections to obtain the free-field response of a
sound level meter
Elektroakustik - Verfahren zur Ermittlung von Korrekturwerten für die Bestimmung des
Freifeld-Frequenzgangs eines Schallpegelmessers
Electroacoustique - méthode de détermination de corrections pour obtenir la réponse en
champ libre d'un sonomètre
Ta slovenski standard je istoveten z: EN 62585:2012
ICS:
17.140.50 Elektroakustika Electroacoustics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 62585
NORME EUROPÉENNE
October 2012
EUROPÄISCHE NORM
ICS 17.140.50
English version
Electroacoustics -
Methods to determine corrections to obtain the free-field response
of a sound level meter
(IEC 62585:2012)
Électroacoustique - Elektroakustik -
Méthode de détermination de corrections Verfahren zur Ermittlung
pour obtenir la réponse en champ libre von Korrekturwerten für die Bestimmung
d'un sonomètre des Freifeld-Frequenzgangs eines
(CEI 62585:2012) Schallpegelmessers
(IEC 62585:2012)
This European Standard was approved by CENELEC on 2012-08-29. CENELEC 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-CENELEC Management Centre or to any CENELEC 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 CENELEC member into its own language and notified
to the CEN-CENELEC Management Centre has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62585:2012 E
Foreword
The text of document 29/770/FDIS, future edition 1 of IEC 62585, prepared by IEC/TC 29
"Electroacoustics" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
(dop) 2013-05-29
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2015-08-29
• latest date by which the national
standards conflicting with the
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 62585:2012 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 61094-8 NOTE Harmonised as EN 61094-8.
IEC 61260 NOTE Harmonised as EN 61260.
IEC 61094-2 NOTE Harmonised as EN 61094-2.
IEC 61094-3 NOTE Harmonised as EN 61094-3.
- 3 - EN 62585:2012
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
IEC 60942 - Electroacoustics - Sound calibrators EN 60942 -
IEC 61094-1 - Measurement microphones - EN 61094-1 -
Part 1: Specifications for laboratory
standard microphones
IEC 61094-5 - Measurement microphones - EN 61094-5 -
Part 5: Methods for pressure calibration
of working standard microphones by
comparison
IEC 61094-6 - Measurement microphones - EN 61094-6 -
Part 6: Electrostatic actuators for
determination of frequency response
IEC/TS 61094-7 - Measurement microphones - - -
Part 7: Values for the difference between
free-field and pressure sensitivity levels
of laboratory standard microphones
IEC 61183 - Electroacoustics - Random-incidence EN 61183 -
and diffuse-field calibration of sound
level meters
IEC 61672-1 - Electroacoustics - Sound level meters - EN 61672-1 -
Part 1: Specifications
IEC 61672-2 - Electroacoustics - Sound level meters - EN 61672-2 -
Part 2: Pattern evaluation tests
IEC 61672-3 - Electroacoustics - Sound level meters - EN 61672-3 -
Part 3: Periodic tests
ISO/IEC Guide 98-3 - Uncertainty of measurement - - -
Part 3: Guide to the expression of
uncertainty in measurement (GUM)
ISO/IEC Guide 99 - International vocabulary of metrology - Basic - -
and general concepts and associated terms
(VIM)
IEC 62585 ®
Edition 1.0 2012-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electroacoustics – Methods to determine corrections to obtain the free-field
response of a sound level meter
Électroacoustique – Méthodes de détermination de corrections pour obtenir la
réponse en champ libre d'un sonomètre
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX X
ICS 17.140.50 ISBN 978-2-83220-290-6
– 2 – 62585 © IEC:2012
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 8
4 Reference environmental conditions . 9
5 Uncertainties of measurement . 9
6 General requirements for measurement of adjustment value and corrections . 10
7 Submission and inspection . 12
8 Determination of the adjustment value at the calibration check frequency . 12
9 Determination of corrections for the typical effects of reflections from the case of
the sound level meter and diffraction of sound around the microphone . 13
10 Determination of corrections for the deviation of the microphone free-field
frequency response from a uniform frequency response . 13
11 Determination of corrections for the use of windscreens and similar accessories . 14
12 Determination of corrections over a range of frequencies when a sound calibrator
is recommended for use by the sound level meter manufacturer . 14
13 Determination of corrections over a range of frequencies when a comparison
coupler is recommended for use by the sound level meter manufacturer . 15
14 Determination of corrections over a range of frequencies when an electrostatic
actuator is recommended for use by the sound level meter manufacturer . 16
15 Documentation . 16
Annex A (normative) Calibration check frequency – Determination of the adjustment
value . 18
Annex B (normative) Determination of the effects of reflections from the case of the
sound level meter and diffraction of sound around the microphone . 20
Annex C (normative) Determination of the effects of the use of windscreens and
similar accessories . 21
Annex D (informative) Determination of corrections for use with sound calibrators to
determine equivalent free-field response at all frequencies of interest . 22
Annex E (informative) Determination of corrections for use with comparison couplers
to determine equivalent free-field frequency response at all frequencies of interest . 25
Annex F (informative) Determination of corrections for use with electrostatic actuators
to determine equivalent free-field frequency response at all frequencies of interest . 28
Annex G (informative) Comparison techniques. 31
Annex H (informative) Exact one-twelfth-octave frequencies . 34
Annex I (informative) Example calculations of expanded uncertainty of measurement . 36
Bibliography . 40
Figure 1 – Mounting methods for the sound level meter . 11
Figure A.1 – Diagrammatic representation of factors for consideration in optimising
adjustment value at the calibration check frequency . 19
Figure D.1 – Measurement steps using a sound calibrator . 22
Figure E.1 – Measurement steps using a comparison coupler . 25
62585 © IEC:2012 – 3 –
Figure F.1 – Measurement steps using an electrostatic actuator . 28
Table H.1 – Exact frequencies for one-twelfth-octave steps over one decade . 35
Table I.1 – Description of likely uncertainty components . 37
Table I.2 – Uncertainty example for a frequency of 1 kHz . 38
Table I.3 – Uncertainty example for a frequency of 8 kHz . 39
– 4 – 62585 © IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROACOUSTICS –
METHODS TO DETERMINE CORRECTIONS TO OBTAIN
THE FREE-FIELD RESPONSE OF A SOUND LEVEL METER
FOREWORD
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...
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