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CLC/TS 61949:2008

(Main)

Ultrasonics - Field characterization - In situ exposure estimation in finite-amplitude ultrasonic beams

Ultrasonics - Field characterization - In situ exposure estimation in finite-amplitude ultrasonic beams

This Technical Specification describes means to allow "attenuated" acoustic quantities to be calculated under conditions where the associated acoustic measurements, made in water using standard procedures, may be accompanied by significant finite-amplitude effects. This Technical Specification establishes: - the general concept of the limits of applicability of acoustic measurements in water resulting from finite-amplitude acoustic effects; - a method to ensure that measurements are made under quasi-linear conditions in order to minimise finite-amplitude effects; - the definition of an acoustic quantity appropriate for establishing quasi-linear conditions; - a threshold value for the acoustic quantity as an upper limit for quasi-linear conditions; - a method for the estimation of attenuated acoustic quantities under conditions of nonlinear propagation in water.

Ultraschall - Charakterisierung von Feldern - Schätzung der In-situ-Expositionswerte in Ultraschallbündeln mit finiten Amplituden

Ultrasons - Caractérisation des champs - Estimation de l'exposition in situ dans les faisceaux ultrasonores d'amplitude finie

Ultrazvok - Določanje lastnosti polja - Ovrednotenje izpostavljenosti v ultrazvočnih žarkih, ki imajo amplitudo s končno velikostjo, na kraju samem (IEC/TS 61949:2007)

General Information

Status
Published
Publication Date
17-Jul-2008
ICS
17.140.50 - Electroacoustics
Technical Committee
CLC/SR 87 - CLC/SR 87
Drafting Committee
IEC/TC 87 - IEC_TC_87
Parallel Committee
IEC/TC 87 - IEC_TC_87
Current Stage
6060 - Document made available - Publishing
Start Date
18-Jul-2008
Completion Date
18-Jul-2008
Ref Project
SIST-TS CLC/TS 61949:2008 - Ultrasonics - Field characterization - In situ exposure estimation in finite-amplitude ultrasonic beams

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TS CLC/TS 61949:2008
01-oktober-2008
8OWUD]YRN'RORþDQMHODVWQRVWLSROMD2YUHGQRWHQMHL]SRVWDYOMHQRVWLYXOWUD]YRþQLK
åDUNLKNLLPDMRDPSOLWXGRVNRQþQRYHOLNRVWMRQDNUDMXVDPHP ,(&76

Ultrasonics - Field characterization - In situ exposure estimation in finite-amplitude
ultrasonic beams (IEC/TS 61949:2007)
Ultraschall - Charakterisierung von Feldern - Schätzung der In-situ-Expositionswerte in
Ultraschallbündeln mit finiten Amplituden (IEC/TS 61949:2007)
Ultrasons - Caractérisation des champs - Estimation de l'exposition in situ dans les
faisceaux ultrasonores d'amplitude finie (CEI/TS 61949:2007)
Ta slovenski standard je istoveten z: CLC/TS 61949:2008
ICS:
17.140.50 Elektroakustika Electroacoustics
SIST-TS CLC/TS 61949:2008 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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

SIST-TS CLC/TS 61949:2008

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

SIST-TS CLC/TS 61949:2008

TECHNICAL SPECIFICATION
CLC/TS 61949

SPÉCIFICATION TECHNIQUE
July 2008
TECHNISCHE SPEZIFIKATION

ICS 17.140.50


English version


Ultrasonics -
Field characterization -
In situ exposure estimation in finite-amplitude ultrasonic beams
(IEC/TS 61949:2007)


Ultrasons -  Ultraschall -
Caractérisation des champs - Charakterisierung von Feldern -
Estimation de l'exposition in situ Schätzung der In-situ-Expositionswerte in
dans les faisceaux ultrasonores Ultraschallbündeln mit finiten Amplituden
d'amplitude finie (IEC/TS 61949:2007)
(CEI/TS 61949:2007)





This Technical Specification was approved by CENELEC on 2008-05-01.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to
make the TS available promptly at national level in an appropriate form. It is permissible to keep conflicting
national standards in force.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.



CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels


© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TS 61949:2008 E

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

SIST-TS CLC/TS 61949:2008
CLC/TS 61949:2008 - 2 -
Foreword
The text of document 87/349/CDV, future edition 1 of IEC/TS 61949, prepared by IEC TC 87, Ultrasonics,
was submitted to the IEC-CENELEC Parallel Unique Acceptance Procedure and was approved by
CENELEC as CLC/TS 61949 on 2008-05-01.
The following date was fixed:
– latest date by which the existence of the CLC/TS
has to be announced at national level (doa) 2008-08-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the Technical Specification IEC/TS 61949:2007 was approved by CENELEC as a Technical
Specification without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60601-2-37 NOTE  Harmonized as EN 60601-2-37:2008 (not modified).
IEC 61828 NOTE  Harmonized as EN 61828:2001 (not modified).
IEC 62359 NOTE  Harmonized as EN 62359:2005 (not modified).
__________

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

SIST-TS CLC/TS 61949:2008
- 3 - CLC/TS 61949:2008

Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. 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
1) 2)
IEC 61161 - Ultrasonics - Power measurement - EN 61161 2007
Radiation force balances and performance
requirements


IEC 62127-1 2007 Ultrasonics - Hydrophones - EN 62127-1 2007
Part 1: Measurement and characterization of
medical ultrasonic fields up to 40 MHz




1)
Undated reference.
2)
Valid edition at date of issue.

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

SIST-TS CLC/TS 61949:2008

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

SIST-T
...

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