Electroacoustics - Instruments for the measurement of sound intensity - Measurement with pairs of pressure sensing microphones

Applies to instruments which detect sound intensity by pairs of spatially separated pressure sensing microphones and specifies performance requirements for instruments used for the measurement of sound intensity, and their associated calibrators. The purpose of this standard is to ensure the accuracy of measurements of sound intensity applied to the determination of sound power in accordance with ISO 9614. To meet the requirements of that standard, instruments are required to analyse the sound intensity in one-third octave or octave bands, and optionally to provide A-weighted band levels.

Elektroakustik - Geräte für die Messung der Schallintensität - Messungen mit Paaren von Druckmikrofonen

Electroacoustique - Instruments pour la mesure de l'intensité acoustique - Mesure au moyen d'une paire de microphones de pression

S'applique uniquement aux instruments qui mesurent l'intensité acoustique au moyen d'une paire de micropones de pression séparés dans l'espace et donne les prescriptions concernant les caractéristiques des instruments utilisés pour la mesure de l'intensité acoustique, ainsi que celles des calibbreurs associés. Le but de cette norme est d'assurer l'exactitude des mesures de l'intensité acoustique, appliquées à la détermination de la puissance acoustique, conformément à l'ISO 9614. Pour satisfaire aux prescriptions de l'ISO 9614, les instruments doivent analyser l'intensité acoustique en bandes d'octaves, ou de tiers d'octaves, et peuvent éventuellement indiquer des niveaux correspondant à la pondération fréquentielle A.

Electroacoustics - Instruments for the measurement of sound intensity - Measurement with pairs of pressure sensing microphones

General Information

Status
Published
Publication Date
17-Jan-1994
Withdrawal Date
30-Nov-1994
Technical Committee
Drafting Committee
Parallel Committee
Current Stage
6060 - Document made available - Publishing
Start Date
18-Jan-1994
Completion Date
18-Jan-1994

Buy Standard

Standard
EN 61043:2000
English language
38 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 61043:2000
01-december-2000
Electroacoustics - Instruments for the measurement of sound intensity -
Measurement with pairs of pressure sensing microphones
Electroacoustics - Instruments for the measurement of sound intensity - Measurement
with pairs of pressure sensing microphones
Elektroakustik - Geräte für die Messung der Schallintensität - Messungen mit Paaren von
Druckmikrofonen
Electroacoustique - Instruments pour la mesure de l'intensité acoustique - Mesure au
moyen d'une paire de microphones de pression
Ta slovenski standard je istoveten z: EN 61043:1994
ICS:
17.140.50 Elektroakustika Electroacoustics
SIST EN 61043:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN 61043:2000

---------------------- Page: 2 ----------------------

SIST EN 61043:2000

---------------------- Page: 3 ----------------------

SIST EN 61043:2000

---------------------- Page: 4 ----------------------

SIST EN 61043:2000

---------------------- Page: 5 ----------------------

SIST EN 61043:2000

---------------------- Page: 6 ----------------------

SIST EN 61043:2000
NORME
CEI
INTERNATIONALE IEC
1043
INTERNATIONAL
Première édition
STANDARD
First edition
1993-12
Electroacoustique — Instruments pour la mesure
de l'intensité acoustique — Mesure au moyen
d'une paire de microphones de pression
Electroacoustics — Instruments for the
measurement of sound intensity —
Measurement with pairs of pressure
sensing microphones
© CEI 1993 Droits de reproduction réservés — Copyright — all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun pro- any form or by any means, electronic or mechanical,
cédé, électronique ou mécanique, y compris la photocopie et including photocopying and microfilm, without permission
les microfilms, sans l'accord écrit de l'éditeur in writing from the publisher.
Bureau Central de la Commission Electrotechnique Internationale 3, rue de Varembe Genève, Suisse
Commission Electrotechnique Internationale CODE PRIX "
International Electrotechnical Commission PRICE CODE V
Meie yHapoAHaa 3netmporexuHueasaa HoMHCCHR
IEC
Pour prix, voir catalogue en vigueur

For price, see current catalogue

---------------------- Page: 7 ----------------------

SIST EN 61043:2000
1043 ©IEC:1993 — 3 —
CONTENTS
Page
FOREWORD 7
INTRODUCTION 9
Clause
1 Scope 11
2 Normative references 11
Definitions
3 13
4 Grades of accuracy 17
5 Reference environmental conditions 19
6 Sound intensity processors: requirements 19
6.1 Frequency range 19
6.2 Filtering 19
6.3 A-weighting 19
6.4 Indicator accuracy 21
6.5 Provision for microphone separation 21
6.6 Presentation of results 21
6.7 Time averaging 21
6.8 Crest factor handling 23
6.9 Pressure-residual intensity index 23
6.10 Provision for phase compensation 23
6.11 Provision for range setting 23
6.12 Provision for overload indication 25
6.13 Provision for corrections for atmospheric pressure and temperature 25
6.14 Operating environment 25
7 Sound intensity probes: requirements 25
7.1 Mechanical construction 25
7.2 Response to sound pressure 27
7.3 Response to sound intensity 27
7.4 Directional response characteristics 29
7.5 Pe rformance in a standing wave field 31
7.6 Pressure-residual intensity index 31
7.7 Environmental conditions 33
8 Sound intensity instruments: requirements 33
9 Power supplies: requirements 33

---------------------- Page: 8 ----------------------

SIST EN 61043:2000
1043 ©IEC:1993 – 5
Clause Page
10 Sound intensity probe calibrators: requirements 33
10.1 Sound pressure calibrators 33
10.2 Residual intensity testing devices 33
10.3 Sound intensity calibrators 35
11 Sound intensity processors: performance verification 35
11.1 Octave and one-third octave filters 35
11.2 Sound intensity indication 37
11.3 Time averaging 37
11.4 Crest factor handling 39
11.5 Pressure-residual intensity index and operating range 39
12 Sound intensity probes: performance verification 41
12.1 Frequency response 41
12.2 Directional response 43
12.3 Performance in a standing wave field 43
12.4 Pressure-residual intensity index 43
13 Calibrators: performance verification 45
13.1 Sound pressure calibrators 45
13.2 Residual intensity testing devices 45
13.3 Sound intensity calibrators 45
14 Field calibration and checks 47
15 Marking and instruction manuals 49
15.1 Marking 49
15.2 Instruction manuals 49
Annexes
A Periodic verification procedures 53
B Sound intensity processors employing autoranging 57
C Sound intensity processors based on DFT analysers converting narrow bands
to one-octave or one-third octave 59
D
RC networks for generating known phase shifts 65
E Dynamic capability index 67
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.