iTeh StandardsiTeh Standards
EURUSD
Your shopping cart is empty.
SIST

SIST EN IEC 60645-7:2025

(Main)

Electroacoustics - Audiometric equipment - Part 7: Instruments for the measurement of auditory evoked potentials (IEC 60645-7:2025)

Electroacoustics - Audiometric equipment - Part 7: Instruments for the measurement of auditory evoked potentials (IEC 60645-7:2025)

IEC 60645-7:2025 applies to instruments designed for the measurement of auditory evoked potentials from the inner ear, the auditory nerve, and the brainstem, evoked by either acoustic or vibratory stimuli of short duration. This document defines the characteristics to be specified by the manufacturer, specifies performance requirements for two types of instruments (screening and diagnostic/clinical), and specifies the functions to be provided on these types. It also specifies a means of describing the physical characteristics, in terms of electrical waveforms, of audiometric reference and test signals of short duration used with auditory evoked potential equipment and other equipment (e.g. otoacoustic emission instruments), and methods for their measurement. The purpose of this document is to ensure that measurements made under comparable test conditions with different instruments complying with this document will be consistent. This document is not intended to restrict development or incorporation of new features, nor to discourage innovative approaches. Evoked response measurement using the application of electric stimuli to a subject is beyond the scope of this document.

Akustik - Audiometer - Teil 7: Geräte zur Messung von akustisch evozierten Potentialen (IEC 60645-7:2025)

Électroacoustique - Appareils audiométriques - Partie 7: Instruments pour le mesurage des potentiels évoqués auditifs (IEC 60645-7:2025)

L'IEC 60645-7:2025 s'applique aux instruments conçus pour le mesurage des potentiels évoqués auditifs de l'oreille interne, du nerf auditif et du tronc cérébral, évoqués par des stimuli acoustiques ou vibratoires de courte durée. Le présent document définit les caractéristiques qui doivent être spécifiées par le fabricant, spécifie les exigences de performances pour deux types d'instruments (dépistage et diagnostic/utilisation clinique) et spécifie les fonctions à prévoir sur ces types. Il spécifie également un moyen pour décrire les caractéristiques physiques, en matière de formes d'onde électriques, des signaux de référence et d'essai audiométriques de courte durée utilisés avec les équipements de mesure de potentiels évoqués auditifs et avec d'autres équipements (par exemple, instruments de mesure d'émissions otoacoustiques), ainsi que les méthodes de mesure associées. Le présent document a pour objet de s'assurer que les mesurages réalisés dans des conditions d'essai comparables avec différents instruments conformes au présent document sont cohérents. Le présent document n'est pas destiné à limiter le développement ou l'ajout de nouvelles caractéristiques ni à décourager les approches innovantes. Le mesurage des potentiels évoqués par l'application de stimuli électriques sur un sujet ne relève pas du domaine d'application du présent document.

Elektroakustika - Avdiometrična oprema - 7. del: Instrumenti za merjenje slušnih potencialov (IEC 60645-7:2025)

General Information

Status
Published
Public Enquiry End Date
27-Feb-2025
Publication Date
23-Oct-2025
ICS
17.140.50 - Electroacoustics
Technical Committee
I11 - Imaginarni 11
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
22-Oct-2025
Due Date
27-Dec-2025
Completion Date
24-Oct-2025
Directive
2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
Ref Project
EN IEC 60645-7:2025 - Electroacoustics - Audiometric equipment - Part 7: Instruments for the measurement of auditory evoked potentials

Relations

Replaces
SIST EN 60645-7:2010 - Electroacoustics - Audiometric equipment - Part 7: Instruments for the measurement of auditory evoked potentials (IEC 60645-7:2009)
Effective Date
01-Dec-2025
Replaces
SIST EN IEC 60645-3:2021 - Electroacoustics - Audiometric equipment - Part 3: Test signals of short duration (IEC 60645-3:2020)
Effective Date
01-Dec-2025
SIST EN IEC 60645-7:2025SIST EN IEC 60645-7:2025
PreviousNext
Standard
SIST EN IEC 60645-7:2025
English language
24 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)


SLOVENSKI STANDARD
01-december-2025
Nadomešča:
SIST EN 60645-7:2010
SIST EN IEC 60645-3:2021
Elektroakustika - Avdiometrična oprema - 7. del: Instrumenti za merjenje slušnih
potencialov (IEC 60645-7:2025)
Electroacoustics - Audiometric equipment - Part 7: Instruments for the measurement of
auditory evoked potentials (IEC 60645-7:2025)
Akustik - Audiometer - Teil 7: Geräte zur Messung von akustisch evozierten Potentialen
(IEC 60645-7:2025)
Électroacoustique - Appareils audiométriques - Partie 7: Instruments pour le mesurage
des potentiels évoqués auditifs (IEC 60645-7:2025)
Ta slovenski standard je istoveten z: EN IEC 60645-7:2025
ICS:
17.140.50 Elektroakustika Electroacoustics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60645-7

NORME EUROPÉENNE
EUROPÄISCHE NORM October 2025
ICS 17.140.50 Supersedes EN 60645-7:2010; EN IEC 60645-3:2020
English Version
Electroacoustics - Audiometric equipment - Part 7: Instruments
for the measurement of auditory evoked potentials
(IEC 60645-7:2025)
Électroacoustique - Appareils audiométriques - Partie 7: Akustik - Audiometer - Teil 7: Geräte zur Messung von
Instruments pour le mesurage des potentiels évoqués akustisch evozierten Potentialen
auditifs (IEC 60645-7:2025)
(IEC 60645-7:2025)
This European Standard was approved by CENELEC on 2025-09-26. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60645-7:2025 E

European foreword
The text of document 29/1189/CDV, future edition 2 of IEC 60645-7, prepared by TC 29
"Electroacoustics" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-10-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-10-31
document have to be withdrawn
This document supersedes EN 60645-7:2010 and EN IEC 60645-3:2020 and all of its amendments
and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60645-7:2025 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 standard indicated:
IEC 61672-1 NOTE Approved as EN 61672-1
ISO 8253-2 NOTE Approved as EN ISO 8253-2
IEC 60645-6 NOTE Approved as EN IEC 60645-6
IEC 60601-2-40 NOTE Approved as EN IEC 60601-2-40
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60318-1 - Electroacoustics - Simulators of human head EN 60318-1 -
and ear - Part 1: Ear simulator for the
measurement of supra-aural and
circumaural earphones
IEC 60318-3 - Electroacoustics - Simulators of human head EN 60318-3 -
and ear - Part 3: Acoustic coupler for the
calibration of supra-aural earphones used in
audiometry
IEC 60318-4 - Electroacoustics - Simulators of human head EN 60318-4 -
and ear - Part 4: Occluded-ear simulator for
the measurement of earphones coupled to
the ear by means of ear inserts
IEC 60318-5 - Electroacoustics - Simulators of human head EN 60318-5 -
and ear - Part 5: 2 cm coupler for the
measurement of hearing aids and
earphones coupled to the ear by means of
ear inserts
IEC 60318-6 - Electroacoustics - Simulators of human head EN 60318-6 -
and ear - Part 6: Mechanical coupler for the
measurement on bone vibrators
IEC 60601-1 - Medical electrical equipment – Part 1: - -
General requirements for basic safety and
essential performance
IEC 60645-1 2017 Electroacoustics - Audiometric equipment - EN 60645-1 2017
Part 1: Equipment for pure-tone and speech
audiometry
IEC 61260-1 - Electroacoustics - Octave-band and EN 61260-1 -
fractional-octave-band filters - Part 1:
Specifications
ISO 389-6 - Acoustics - Reference zero for the EN ISO 389-6 -
calibration of audiometric equipment – Part
6: Reference threshold of hearing for test
signals of short duration
ISO/IEC Guide 98- - Uncertainty of measurement - Part 3: Guide - -
3 to the expression of uncertainty in
measurement (GUM:1995)
IEC 60645-7 ®
Edition 2.0 2025-08
INTERNATIONAL
STANDARD
Electroacoustics - Audiometric equipment -
Part 7: Instruments for the measurement of auditory evoked potentials
ICS 17.140.50  ISBN 978-2-8327-0589-6

IEC 60645-7:2025-08(en)
IEC 60645-7:2025 © IEC 2025
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Requirements for specific instruments . 11
5 General specifications . 12
5.1 Measuring system . 12
5.1.1 Units of measurement . 12
5.1.2 Measurement range . 12
5.1.3 Time resolution . 12
5.2 Stimulus system . 12
5.2.1 General requirements . 12
5.2.2 Stimulus types. 12
5.3 Test quality assuring system . 13
5.3.1 Recording conditions . 13
5.3.2 Response detection. 13
5.3.3 Quality estimates . 13
5.4 Presentation of results . 13
6 Reference signals . 13
6.1 General . 13
6.2 Reference click . 14
6.3 Reference tone-burst . 15
6.4 Reference broadband chirp . 15
6.5 Reference octave-band chirps . 16
7 Calibration and measurement of short-duration signals . 16
8 Demonstration of conformity with specifications . 16
8.1 General . 16
8.2 Signal-to-noise ratio improvement . 17
8.3 Maximum permitted expanded uncertainty of measurements U . 17
max
9 General requirements. 17
9.1 Marking . 17
9.2 Instruction manual . 17
9.3 Safety requirements . 17
9.3.1 General . 17
9.3.2 Immunity to power and radiofrequency fields . 17
9.4 Warm-up time . 18
9.5 Voltage supply variation and environmental conditions . 18
9.5.1 Mains operation . 18
9.5.2 Battery operation . 18
9.5.3 Environmental conditions . 18
10 Periodic calibration . 18
Annex A (informative) Relationship between tolerance interval, corresponding
acceptance interval and the maximum permitted uncertainty of measurement . 19
Bibliography . 20
IEC 60645-7:2025 © IEC 2025
Figure 1 – Basic specification of an electrical reference click . 8
Figure 2 – Illustration of the method of measurement of peak-to-peak equivalent signal
levels . 8
Figure 3 – Temporal characteristics of an electrical reference tone-burst . 9
Figure 4 – Time domain specification of the electrical reference click . 14
Figure 5 – Temporal characteristics of the electrical reference broadband chirp . 15
Figure A.1 – Relationship between tolerance interval, corresponding acceptance interval
and the maximum permitted uncertainty of measurement . 19

Table 1 – Instrumentation requirements. 11
Table 2 – Documentation of test conditions, parameters and results . 13
Table 3 – Values of U for basic measurements . 17
max
IEC 60645-7:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electroacoustics - Audiometric equipment-
Part 7: Instruments for the measurement of auditory evoked potentials

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all
national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-
operation on all questions concerning standa
...

Questions, Comments and Discussion

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

This May Also Interest You

SIST
SIST EN IEC 61847:2025(Main)
Ultrasonics - Surgical systems - Measurement and declaration of the basic output characteristics (IEC 61847:2025)
EN IEC 61847:2025

IEC 61847:2025 specifies:
– the essential non-thermal output characteristics of ultrasonic surgical units;
– methods of measurement of these output characteristics;
– those characteristics to be declared by the manufacturers of such equipment.
This document is applicable to equipment which meets the criteria of a), b) and c) below:
a) ultrasonic surgical systems operating in the frequency range 20 kHz to 120 kHz; and
b) ultrasonic surgical systems whose use is the fragmentation, emulsification, debridement, or cutting of human tissue, whether or not those effects are delivered in conjunction with tissue removal or coagulation; and
c) ultrasonic surgical systems in which an acoustic wave is conducted by means of a specifically designed wave guide to deliver energy to the surgical site.
This document is not applicable to:
– lithotripsy equipment which uses extracorporeally induced pressure pulses, focused through liquid conducting media and the soft tissues of the body;
– surgical systems used as part of the therapeutic process (hyperthermia systems);
– surgical systems whose mechanism of action is through frictional heat generated by tissue in contact with the wave guide, e.g. clamp coagulators or clamping vibrational cutters;
– surgical systems whose mechanism of action is through focused ultrasound for either thermal degradation (high intensity focused ultrasound – HIFU or HITU) or cavitation erosion (Histotripsy) of tissue remote from the ultrasound transducer;
– surgical systems whose mechanism of action is through erosion of hard tissues in contact with the applicator tip, e.g. bone cutting or drilling.
This document does not deal with the effectiveness or safety of ultrasonic surgical systems. This document does not deal with airborne noise from the systems, which can affect operators and patients.
IEC 61847:2025 cancels and replaces the first edition published in 1998. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) The upper frequency covered by this document has been raised from 60 kHz to 120 kHz.
b) The hydrophone method of measuring ultrasound power is now normative. Because of difficulties in using the calorimetry method of measuring ultrasound power, it is no longer the primary approach.
c) It is recognised that some systems can have more than one mode of vibration under user control, and the measurement techniques and declarations have been updated to address this.
d) The high-frequency component, which relates to cavitation developed at the applicator tip and the vibration amplitude at which cavitation occurs is addressed.
e) Specific requirements for measurement at excursion levels where no cavitation is present, and extrapolation to maximum excursion level(s) are described.
f) Guidance is provided to adapt the methodology described to more complex designs and vibration patterns, excursion directions, and their output characteristics.
g) Guidance is provided with respect to measurement tank arrangements for different types of systems.
h) The list of ultrasound methods and systems not covered by this document was extended to incorporate recent developments.
i) Definitions for cavitation related terms were added.
j) Requirements for the measurement of directivity characteristics of the applicator tip were changed.
k) Annex A was modified and Figure A.1 wa

  • Standard
    38 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 61846:2025(Main)
Ultrasonics - Therapeutic focused short pressure pulse sources - Characteristics of fields (IEC 61846:2025)
EN IEC 61846:2025

IEC 61846:2025 is applicable to:
– therapy equipment using extracorporeally induced focused pressure pulse waves;
– therapy equipment producing focused mechanical energy excluding thermal energy.
This document does not apply to percutaneous and laser lithotripsy equipment.
This document does not apply to:
– histotripsy or other therapeutic ultrasound bursts of longer time duration than that of the pressure pulse;
– non-focused pressure pulse equipment.
This document specifies:
– measurable parameters which could be used in the declaration of the acoustic output of extracorporeal focused pressure pulse equipment;
– methods of measurement and characterization of the pressure field generated by focused pressure pulse equipment.
While this document has been developed for equipment intended for use in lithotripsy, it has been developed such that, as long as no other specific standards are available to be used for other medical applications of therapeutic extracorporeal focused pressure pulse equipment, this document can be used as a guideline.
IEC 61846:2025 cancels and replaces the first edition published in 1998. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Change of title: "pressure pulse lithotripters" in the previous edition is changed to "therapeutic focused short pressure pulse sources" in order to take into account the development in the relevant technical and biomedical applications of such sources, which were originally used only for (kidney) lithotripsy, while recent applications include a wide range for the treatment of, for example, stone diseases, orthopaedic pain, tissue, cardiac and brain diseases.
The term "focused" was added to differentiate IEC 61846 from IEC 63045.
The term "short" was added to align the nomenclature to IEC 63045 and to differentiate IEC 61846 from standards in the HIFU and HITU fields.
b) Clause 1 and elsewhere in the document: The term "lithotripsy" is changed to "therapy" in order to account for the wide range of applications beyond stone diseases.
c) Clause 3: The "−6 dB" parameter definitions are replaced by "−n dB" to avoid misconceptions in the significance and use of these parameters and to account for newer findings in literature.
Additional "n MPa" parameters are introduced for the same reasons.
The definitions of "derived" parameters are aligned to those in recently published standards, for example IEC 62127-1.
New definitions were added which describe parameters appearing in newer relevant literature, for example "momentum", "average positive acoustic pressure", "cavitation induction index", "pulse to pulse variability", "total pressure pulse energy dose".
d) Clause 6: The terms "focus hydrophone" and "field hydrophone" were removed to account for newer technical developments. New terms distinguish between "hydrophones for pressure pulse measurements" and "hydrophones for quality assurance".
e) Annexes: Descriptions, tables and figures were edited to account for newer literature and standards as well as technical developments.

  • Standard
    41 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN 61669:2016/A1:2025(Amendment)
Electroacoustics - Measurement of real-ear acoustical performance characteristics of hearing aids (IEC 61669:2015/AMD1:2025)
EN 61669:2016/A1:2025
  • Amendment
    6 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 62127-2:2025(Main)
Ultrasonics - Hydrophones - Part 2: Calibration for ultrasonic fields (IEC 62127-2:2025)
EN IEC 62127-2:2025

IEC 62127-2:2025 specifies:
- absolute hydrophone calibration methods;
- relative (comparative) hydrophone calibration methods.
Recommendations and references to accepted literature are made for the various relative and absolute calibration methods in the frequency range covered by this document.
This document is applicable to
- hydrophones used for measurements made in water and in the ultrasonic frequency range 50 kHz to 100 MHz;
- hydrophones employing piezoelectric sensor elements, designed to measure the pulsed wave and continuous wave ultrasonic fields generated by ultrasonic equipment;
- hydrophones with or without a hydrophone pre-amplifier.
IEC 62127-2:2025 cancels and replaces the first edition published in 2007, Amendment 1:2013 and Amendment 2:2017. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the upper frequency limit of 40 MHz has been removed;
b) hydrophone sensitivity definitions have been changed to recognize sensitivities as complex-valued quantities;
c) directional response measurement and effective size determination procedures have been updated in 12.5.1 to align with recent changes in IEC 62127-3;
d) Annex F has been amended to comprise a calibration technique for high-frequency complex-valued calibration;
e) the reciprocity method description in Annex K was extended to also comprise focusing transducers.

  • Standard
    117 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 63412-1:2024(Main)
Ultrasonics - Shear-wave elastography - Part 1: Specifications for the user interface (IEC 63412-1:2024)
EN IEC 63412-1:2024

IEC 63412-1:2024 specifies quantities and parameters which it is essential to provide to the user of shear-wave elastography systems, many in the image headers.
This document is applicable to medical-diagnostic, ultrasonic shear-wave elastography systems, exciting (internally or externally) shear waves and tracking their propagation within biological tissue.

  • Standard
    22 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 60118-0:2024(Main)
Electroacoustics - Hearing aids - Part 0: Measurement of the performance characteristics of hearing aids (IEC 60118-0:2022)
EN IEC 60118-0:2024

IEC 60118-0:2022 gives recommendations for the measurement of the performance characteristics of air conduction hearing aids measured with an acoustic coupler or occluded ear simulator.
This document is applicable to the measurement and evaluation of the electroacoustical characteristics of hearing aids, for example for type testing and manufacturer data sheets.
This document is also applicable for the measurement of the performance characteristics of hearing aids for production, supply and delivery quality-assurance purposes.
The measurement results obtained by the methods specified in this document will express the performance under conditions of the measurement and can deviate substantially from the performance of the hearing aid under actual conditions of use.
This document primarily uses an acoustic coupler according to IEC 60318-5 which is only intended for loading a hearing aid with specified acoustic impedance and is not intended to reproduce the sound pressure in a person's ear. For measurements reflecting the output level in the normal human ear the occluded ear simulator according to IEC 60318-4 can be used. For extended high-frequency measurements and for deep insert hearing aids, the acoustic coupler according to IEC 60318-8 can be used.
This document also covers measurement of hearing aids with non-acoustic inputs, such as wireless, inductive or electrical input.
This document does not cover the measurement of hearing aids for simulated in situ working conditions, for which IEC 60118-8 can be applied.
This document does not cover the measurement of hearing aids under typical user settings and using a speech-like signal, for which IEC 60118-15 can be applied.
IEC 60118-0:2022 merges and updates the methods previously described in IEC 60118-0:2015 and IEC 60118-7:2005. It cancels and replaces the third edition of IEC 60118-0 published in 2015. This edition constitutes a technical revision.
Measurements for quality control as described in IEC 60118-7:2005 can be found in Clause 10 of this document.
This edition includes the following significant technical changes with respect to previous editions:
a) the default use of an acoustic coupler according to IEC 60318-5,
b) addition of the optional use of an occluded ear simulator according to IEC 60318-4,
c) addition of the optional use of an acoustic coupler according to IEC 60318-8 (new standard based on IEC TS 62886) when information about the response above 8 kHz is needed, or the optional use of the acoustic coupler according to IEC 60318-8 for deep insert hearing aids,
d) the addition of measurements of the performance of hearing aids for production, supply and delivery quality assurance purposes,
e) corrected and updated measurement configuration and methods, adding the use of a sequential measurement as preferred configuration,
f) updated and expanded measurement procedures for the non-acoustic inputs of the hearing aid.

  • Standard
    77 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 63305:2024(Main)
Underwater Acoustics - Calibration of acoustic wave vector receivers in the frequency range 5 Hz to 10 kHz (IEC 63305:2024)
EN IEC 63305:2024

IEC 63305:2024 specifies methods and procedures for calibration of vector receivers in the frequency range 5 Hz to 10 kHz, which are applicable to vector receivers based on the two different principles. In addition, it describes an absolute method of inertial vector receiver calibration in air using optical interferometry.
Usually, acoustic wave vector receivers are designed and constructed based on one of two principles. One is the sound pressure difference (gradient) principle. When measuring with this sensor, the vector receiver is rigidly fixed on a mount and supported in water. The other is the co-vibrating (inertial) principle. When measuring with this sensor, the vector receiver is suspended on a mount and supported in water in a non-rigid manner, which allows the vector receiver co-vibrate in the same direction as the sound particle in the sound wave field.
Many methods have been used to calibrate vector receivers, such as free-field calibration, calibration in standing wave tube and calibration in a travelling wave tube.

  • Standard
    65 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 62127-3:2023(Main)
Ultrasonics - Hydrophones - Part 3: Properties of hydrophones for ultrasonic fields (IEC 62127-3:2022)
EN IEC 62127-3:2023

IEC 62127-3:2022 is available as IEC 62127-3:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 62127-3:2022 specifies relevant hydrophone characteristics. This document is applicable to:
- hydrophones employing piezoelectric sensor elements, designed to measure the pulsed and continuous wave ultrasonic fields generated by ultrasonic equipment;
- hydrophones used for measurements made in water;
- hydrophones with or without an associated pre-amplifier.
IEC 62127-3:2022 cancels and replaces the first edition published in 2007 and Amendment 1:2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition.
a) The upper frequency limit of 40 MHz has been removed.
b) Hydrophone sensitivity definitions have been changed to recognize sensitivities as complex-valued quantities.
c) Procedures to determine the effective hydrophone size have been changed according to the rationale outlined in Annex B.
d) Requirements on the frequencies for which the effective hydrophone size shall be provided have been changed to achieve practicality for increased frequency bands.
e) The new Annex B and Annex C have been added.
f) Annex A has been updated to reflect the changes of the normative parts.

  • Standard
    34 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 60318-7:2023(Main)
Electroacoustics - Simulators of human head and ear - Part 7: Head and torso simulator for the measurement of sound sources close to the ear (IEC 60318-7:2022)
EN IEC 60318-7:2022

This part of IEC 60318 describes a head and torso simulator, or manikin, intended for the measurement of sound sources placed close to the ear in the frequency range from 100 Hz to 16 000 Hz.
The manikin described in this part of IEC 60318 is intended for airborne acoustic measurements only. It is not suitable for measurements which depend upon vibration transmission paths such as bone conduction, or for measurements requiring the simulation of bone or tissue.
This document specifies the manikin in terms of both its geometrical dimensions and its acoustical properties. For conformance with this document, a manikin shall be compliant with both sets of specifications.

  • Standard
    36 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 60318-8:2022(Main)
Electroacoustics - Simulators of human head and ear - Part 8: Acoustic coupler for highfrequency measurements of hearing aids and earphones coupled to the ear by means of ear inserts (IEC 60318-8:2022)
EN IEC 60318-8:2022

IEC 60318-8:2022 describes an acoustic coupler for loading a hearing aid or insert earphone with a specified acoustic impedance when testing its acoustic performance, in the frequency range up to 16 kHz. It is suitable for air-conduction hearing aids and earphones, coupled to the ear by means of ear inserts, earmoulds or similar devices.
The acoustic coupler does not simulate the human ear. However, it has an effective volume of only 0,4 cm3, which is small enough not to produce significant resonances in the coupler in the frequency range below 16 kHz. Therefore, it will load the earphone with a known acoustic impedance, which allows repeatable measurements with low uncertainty to be obtained on earphones used in extended high-frequency audiometry.

  • Standard
    36 pages
    English language
    sale 10% off
    e-Library read for
    1 day