EN 62127-1:2007/A1:2013

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

This part of IEC 62127 specifies methods of use of calibrated hydrophones for the measurement in liquids of acoustic fields generated by ultrasonic medical equipment operating
in the frequency range up to 40 MHz. The objectives of this standard are:
– to define a group of acoustic parameters that can be measured on a physically sound basis;
– to define a second group of parameters that can be derived under certain assumptions from these measurements, and called derived intensity parameters;
– to define a measurement procedure that may be used for the determination of acoustic pressure parameters;
– to define the conditions under which the measurements of acoustic parameters can be made in the frequency range up to 40 MHz using calibrated hydrophones;
– to define procedures for correcting, for limitations caused by the use of hydrophones with finite bandwidth and finite active element size.
NOTE 1 Throughout this standard, SI units are used. In the specification of certain parameters, such as beam areas and intensities, it may be convenient to use decimal multiples or submultiples. For example beam area may be specified in cm2 and intensities in W/cm2 or mW/cm2.
NOTE 2 The hydrophone as defined may be of a piezoelectric or an optic type. The introduction however implies that optical hydrophones are not covered.

Ultraschall - Hydrophone - Teil 1: Messung und Charakterisierung von medizinischen Ultraschallfeldern bis zu 40 MHz

Ultrasons - Hydrophones - Partie 1: Mesurage et caractérisation des champs ultrasoniques médicaux jusqu'à 40 MHz

Ultrazvok - Hidrofoni - 1. del: Meritve in karakterizacija medicinskih ultrazvočnih polj do 40 MHz - Dopolnilo A1 (IEC 62127-1:2007/A1:2013)

General Information

• Status: Published
• Publication Date: 21-Mar-2013
• Withdrawal Date: 14-Mar-2016
• ICS: 11.040.50 - Radiographic equipment
• Technical Committee: CLC/SR 87 - CLC/SR 87
• Drafting Committee: IEC/TC 87 - IEC_TC_87
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 22-Mar-2013
• Completion Date: 22-Mar-2013
• Ref Project: SIST EN 62127-1:2008/A1:2014 - Ultrasonics - Hydrophones - Part 1: Measurement and characterization of medical ultrasonic fields up to 40 MHz

Relations

• Replaced By: EN IEC 62127-1:2022 - Ultrasonics - Hydrophones - Part 1: Measurement and characterization of medical ultrasonic fields
• Effective Date: 10-May-2022
• Amends: EN 62127-1:2007 - Ultrasonics - Hydrophones - Part 1: Measurement and characterization of medical ultrasonic fields up to 40 MHz
• Effective Date: 28-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2014
8OWUD]YRN+LGURIRQLGHO0HULWYHLQNDUDNWHUL]DFLMDPHGLFLQVNLKXOWUD]YRþQLK
SROMGR0+]'RSROQLOR$,(&$
Ultrasonics - Hydrophones - Part 1: Measurement and characterization of medical
ultrasonic fields up to 40 MHz
Ultraschall - Hydrophone - Teil 1: Messung und Charakterisierung von medizinischen
Ultraschallfeldern bis zu 40 MHz
Ultrasons - Hydrophones - Partie 1: Mesures et caractérisation des champs ultrasonores
médicaux jusqu'à 40 MHz
Ta slovenski standard je istoveten z: EN 62127-1:2007/A1:2013
ICS:
11.040.01 Medicinska oprema na Medical equipment in general
splošno
17.140.50 Elektroakustika Electroacoustics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 62127-1/A1
NORME EUROPÉENNE
March 2013
EUROPÄISCHE NORM
ICS 11.040.50
English version
Ultrasonics - Hydrophones -
Part 1: Measurement and characterization
of medical ultrasonic fields up to 40 MHz
(IEC 62127-1:2007/A1:2013)
Ultrasons - Hydrophones -  Ultraschall - Hydrophone -
Partie 1: Mesurage et caractérisation Teil 1: Messung und Charakterisierung
des champs ultrasoniques médicaux von medizinischen Ultraschallfeldern bis
jusqu'à 40 MHz zu 40 MHz
(CEI 62127-1:2007/A1:2013) (IEC 62127-1:2007/A1:2013)

This amendment A1 modifies the European Standard EN 62127-1:2007; it was approved by CENELEC on 2013-
03-15. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate
the conditions for giving this amendment 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 amendment 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

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62127-1:2007/A1:2013 E

Foreword
The text of document 87/518/FDIS, future amendment 1 to edition 1 of IEC 62127-1, prepared by
IEC/TC 87 "Ultrasonics" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 62127-1:2007/A1:2013.
The following dates are fixed:
(dop) 2013-12-15
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2016-03-15
• 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 62127-1:2007/A1:2013 was approved by CENELEC as a
European Standard without any modification.
In the Bibliography of EN 62127-1:2007, replace the existing reference to IEC 61157 by the following:

IEC 61157:2007 NOTE Harmonised as EN 61157:2007 (not modified).

In the Bibliography of EN 62127-1:2007, add the following new reference:

IEC/TS 61949:2007 NOTE Harmonised as CLC/TS 61949:2008 (not modified).

- 3 - EN 62127-1:2007/A1:2013
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

Modification in Annex ZA of EN 62127-1:2007:

Publication Year Title EN/HD Year

In Annex ZA of EN 62127-1:2007, replace the reference to the ISO Guide to the
expression of uncertainty in measurement as follows:
ISO/IEC Guide 98-3 - Uncertainty of measurement - - -
Part 3: Guide to the expression of
uncertainty in measurement (GUM:1995)

IEC 62127-1 ®
Edition 1.0 2013-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Ultrasonics – Hydrophones –
Part 1: Measurement and characterization of medical ultrasonic fields up to

40 MHz
Ultrasons – Hydrophones –
Partie 1: Mesurage et caractérisation des champs ultrasoniques médicaux

jusqu'à 40 MHz
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX Q
ICS 11.040.50 ISBN 978-2-83220-599-0

– 2 – 62127-1 Amend.1 © IEC:2013
FOREWORD
This amendment has been prepared by IEC technical committee 87: Ultrasonics.
The text of this amendment is based on the following documents:
FDIS Report on voting
87/518/FDIS 87/524/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
Replace throughout the document:
“non-linear” by “nonlinear”,
This replacement applies to the English text only.
Replace throughout the document:
“non-linearity” by “nonlinearity”
This replacement applies to the English text only.

INTRODUCTION
Delete, in the second paragraph, the term “piezoelectric”.
Delete, in the second paragraph, the last two sentences.
1 Scope
Delete, in Note 2, the second sentence.
2 Normative references
Replace the reference to the ISO Guide to the expression of uncertainty in measurement as
follows:
62127-1 Amend.1 © IEC:2013 – 3 –
ISO/IEC Guide 98-3, Uncertainty of measurement – Part 3: Guide to the expression of
uncertainty in measurement (GUM:1995)
3 Terms, definitions and symbols
Replace, throughout this clause, the phrase “watts per metre squared” by “watts per square
metre” (9 times).
Replace, throughout this clause, the phrase “metres squared” by “square metres” (3 times).
3.1
acoustic pulse waveform
Delete Note 2.
3.3
acoustic frequency
acoustic-working frequency
Replace, in the second sentence of Note 1," 3.3.1 and 3.3.2" by "3.3.1, 3.3.2, 3.3.3 and
3.3.4".
3.3.1
zero-crossing acoustic-working frequency
f
awf
Replace the existing text of the definition by the following:
number, n, of consecutive half-cycles (irrespective of polarity) divided by twice the time
between the commencement of the first half-cycle and the end of the n-th half-cycle
NOTE 1 None of the n consecutive half-cycles should show evidence of phase change.
NOTE 2 The measurement should be performed at terminals in the receiver that are as close as possible to the
receiving transducer (hydrophone) and, in all cases, before rectification.
NOTE 3 This frequency is determined according to the procedure specified in IEC/TR 60854.
NOTE 4 This frequency is intended for continuous-wave systems only.
3.3.2
arithmetic-mean acoustic-working frequency
f
awf
Add the following note to the definition:
NOTE 3 If f is not found within the range < 3f , f is to be understood as the lowest frequency above this range
2 1 2
at which the spectrum magnitude is 3 dB below the peak magnitude.
3.3.3
peak pulse acoustic frequency
Delete the full stop after the symbol f .
p
3.4
azimuth axis
Figure 1 – Schematic diagram of the different planes and lines in an ultrasonic field
In the figure, replace “Y” by “Z” and “Z” by “Y”.
In the key of the figure, replace “Y beam axis” by “Y elevation axis” and “Z elevation axis” by
“Z beam axis”.
– 4 – 62127-1 Amend.1 © IEC:2013
3.7
beam area
Replace the symbol by: “A , A ”
b,6 b,20
Replace the existing text of Note 1 by the following:
NOTE 1 If the position of the plane is not specified, it is the plane passing through the point corresponding to the
maximum value of the pulse-pressure-squared integral in the whole acoustic field.
Replace, in Note 3, the word “levels” by “fractions”.
3.22
effective radius of a non-focused ultrasonic transducer
Replace the term by effective radius of a non-focusing ultrasonic transducer
Replace the term in the Note by effective radius of a non-focusing ultrasonic transducer
3.28
far field
Replace the existing text by the following:
region of the field where z > z aligned along the beam axis for planar non-focusing
T
transducers
NOTE 1 In the far field, the sound pressure appears to be spherically divergent from a point on or near the
radiating surface. Hence the pressure produced by the sound source is approximately inversely proportional to the
distance from the source.
NOTE 2 The term “far field” is used in this International Standard only in connection with non-focusing source
transducers. For focusing transducers a different terminology for the various parts of the transmitted field applies
(see IEC 61828).
NOTE 3 If the shape of the transducer aperture produces several transition distances, the one furthest from the
transducer is used.
3.34
instantaneous intensity
Replace the existing text of Note 1 by the following:
NOTE 1 Instantaneous intensity is the product of instantaneous acoustic pressure and particle velocity. It is
difficult to measure intensity in the ultrasound frequency range. For the measurement purposes referred to in this
International Standard and under conditions of sufficient distance from the external transducer aperture (at least
one transducer diameter, or an equivalent transducer dimension in the case of a non-circular transducer) the
instantaneous intensity can be approximated by the derived instantaneous intensity.
3.37
near field
Replace the existing definition and note by the following:
region of the field where z < z aligned along the beam axis for planar non-focusing
T
transducers
NOTE 1 For circular planar transducers, this is at a distance less than A /πλ, where A is the output beam
ob ob
area and λ is the wavelength of the ultrasound corresponding to the acoustic frequency.
NOTE 2 If the shape of the transducer aperture produces several transition distances, the one closest to the
transducer shall be used.
62127-1 Amend.1 © IEC:2013 – 5 –
3.38
non-linear propagation parameter
Replace the existing term, symbol and definition by the following:
local distortion parameter
σ
q
index which permits the prediction of nonlinear distortion of ultrasound for a specific
ultrasonic transducer, and is given by σ from:
q
2πf β 1
awf
(2)
σ = z p
q m
ρ⋅c F
a
where:
z is the axial distance of the point of interest to the transducer face;

p is the mean-peak acoustic pressure at the point in the acoustic field corresponding to
m
the spatial-peak temporal-peak acoustic pressure;
β is the nonlinearity parameter ( β = 1 + B/2A = 3,5 for pure water at 20 °C );
f is the acoustic-working frequency;
awf
F is the local area factor .
a
[SOURCE: IEC/TS 61949:2007, definition 3.12, modified – the text of the definition has
changed substantially, the equation however is unchanged.]
3.43
peak acoustic pressure
Replace the existing symbol by: “p (or p ) or p (or p )”.
r - c +
3.44
peak-rarefactional acoustic pressure
Replace the existing symbol by: “p (or p )”
r -
3.45
peak-compressional acoustic pressure
Replace symbol by: “p (or p )”
c +
3.47
pulse-average intensity
I
pa
Replace, in the definition, the word “ratio” by “quotient”.
Add the following new note and number the existing note as Note 2.:
NOTE 1 This definition applies to pulses and bursts.
3.51
pulse repetition period
Delete, in Note 1, the second sentence ("See also IEC 60469-1:1987, 5.3.2.1.").
3.52
pulse repetition rate
Delete Note 1.
Renumber Note 2 as Note.
– 6 – 62127-1 Amend.1 © IEC:2013
3.65
temporal-average intensity
Replace the existing Note 1 by the following:
NOTE 1 The time-average should be taken over an integral number of acoustic repetition periods.
Add the following new Note 2 and renumber the existing Note 2 as Note 3:
NOTE 2 (Relating to ultrasonic medical diagnostic systems) in principle, the temporal-average intensity is an
average over a relatively long time interval. For non-auto-scanning systems, the instantaneous intensity should
be averaged over one or more pulse repetition periods. For auto-scanning systems, the instantaneous
intensity should be averaged over one or more scan repetition periods for a specified operating mode.
3.76
ultrasonic transducer element group dimensions
Replace, in the definition, the term “ultrasonic transducer ele
...