iTeh StandardsiTeh Standards
EURUSD
Your shopping cart is empty.
ISO

ISO 389-8:2004

(Main)

Acoustics — Reference zero for the calibration of audiometric equipment — Part 8: Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones

Acoustics — Reference zero for the calibration of audiometric equipment — Part 8: Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones

ISO 389-8:2004 specifies reference equivalent threshold sound pressure levels (RETSPLs) for pure tones in the frequency range from 125 Hz to 8 kHz, applicable to the calibration of air conduction audiometers equipped with a particular model of circumaural earphones (SENNHEISER HDA 200). Some notes and references on the derivation and the test conditions used to determine the recommended reference levels are given in Annex A and the Bibliography. The sound attenuation of the earphone is given in Annex B. For speech audiometers of types A-E and B-E, the correction figures of the earphone for a free-field equivalent output are given in Annex C.

Acoustique — Zéro de référence pour l'étalonnage d'équipements audiométriques — Partie 8: Niveaux de référence équivalents de pression acoustique liminaire pour les écouteurs à sons purs circumauraux

L'ISO 389-8:2004 spécifie un niveau de référence équivalent de pression acoustique liminaire (RETSPL) pour des sons purs dans le domaine de fréquences comprises entre 125 Hz et 8 kHz, applicables à l'étalonnage des audiomètres en conduction aérienne équipés d'un modèle particulier d'écouteurs circumauraux (SENNHEISER HDA 200). Des commentaires et des références sur l'obtention et les conditions d'essai utilisées pour déterminer les niveaux de référence recommandés sont donnés à l'Annexe A et dans la Bibliographie. L'affaiblissement acoustique de l'écouteur est donné dans l'Annexe B. Les valeurs de correction du niveau de sortie pour l'équivalence au champ libre pour l'écouteur des audiomètres vocaux de types A-E et B-E sont données dans l'Annexe C.

General Information

Status
Published
Publication Date
13-May-2004
ICS
13.140 - Noise with respect to human beings
Technical Committee
ISO/TC 43 - Acoustics
Drafting Committee
ISO/TC 43/WG 1 - Threshold of hearing
Current Stage
9093 - International Standard confirmed
Completion Date
30-Sep-2022
Ref Project

Buy Standard

ISO 389-8:2004 - Acoustics -- Reference zero for the calibration of audiometric equipmentISO 389-8:2004 - Acoustics -- Reference zero for the calibration of audiometric equipment
PreviousNext
Standard
ISO 389-8:2004 - Acoustics -- Reference zero for the calibration of audiometric equipment
English language
7 pages
sale 15% off
Preview
sale 15% off
Preview
ISO 389-8:2004 - Acoustique -- Zéro de référence pour l'étalonnage d'équipements audiométriquesISO 389-8:2004 - Acoustique -- Zéro de référence pour l'étalonnage d'équipements audiométriques
PreviousNext
Standard
ISO 389-8:2004 - Acoustique -- Zéro de référence pour l'étalonnage d'équipements audiométriques
French language
7 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 389-8
First edition
2004-05-15


Acoustics — Reference zero for the
calibration of audiometric equipment —
Part 8:
Reference equivalent threshold sound
pressure levels for pure tones and
circumaural earphones
Acoustique — Zéro de référence pour l'étalonnage d'équipements
audiométriques —
Partie 8: Niveaux de référence équivalents de pression acoustique
liminaire pour les écouteurs à sons purs circumauraux




Reference number
ISO 389-8:2004(E)
©
ISO 2004

---------------------- Page: 1 ----------------------
ISO 389-8:2004(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.


©  ISO 2004
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland

ii © ISO 2004 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 389-8:2004(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 389-8 was prepared by Technical Committee ISO/TC 43, Acoustics.
ISO 389 consists of the following parts, under the general title Acoustics — Reference zero for the calibration
of audiometric equipment:
— Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones
— Part 2: Reference equivalent threshold sound pressure levels for pure tones and insert earphones
— Part 3: Reference equivalent threshold force levels for pure tones and bone vibrators
— Part 4: Reference levels for narrow-band masking noise
— Part 5: Reference equivalent threshold sound pressure levels for pure tones in the frequency range 8 kHz
to 16 kHz
— Part 6: Reference equivalent threshold sound pressure levels for acoustic test signals of short duration
— Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions
— Part 8: Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones
Part 9 on preferred test conditions for the standardization of reference equivalent threshold sound pressure
levels or vibratory force levels, is under preparation.
© ISO 2004 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 389-8:2004(E)
Introduction
This part of ISO 389 has been established in order to be able to use the same earphone for pure tone
audiometry in the frequency range 125 Hz to 16 000 Hz. It specifies reference values from 125 Hz to 8 000 Hz.
ISO/TR 389-5 specifies values from 8 000 Hz to 16 000 Hz.
The reference values are based on information provided by laboratories in different countries, representing the
most reliable data available at this time.
At present, reference values for only one type of circumaural earphone, SENNHEISER HDA 200, are
available. This earphone provides a good attenuation of background noise and its frequency response is
without pronounced resonances on a human ear as well as on an ear simulator.

iv © ISO 2004 – All rights reserved

---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 389-8:2004(E)

Acoustics — Reference zero for the calibration of audiometric
equipment —
Part 8:
Reference equivalent threshold sound pressure levels for pure
tones and circumaural earphones
1 Scope
This part of ISO 389 specifies reference equivalent threshold sound pressure levels (RETSPLs) for pure tones
in the frequency range from 125 Hz to 8 kHz, applicable to the calibration of air conduction audiometers
equipped with a particular model of circumaural earphones (SENNHEISER HDA 200).
NOTE Some notes and references on the derivation and the test conditions used to determine the recommended
reference levels are given in Annex A and the Bibliography.
The sound attenuation of the earphone is given in Annex B. For speech audiometers of types A-E and B-E
(see IEC 60645-2), the correction figures of the earphone for a free-field equivalent output are given in
Annex C.
2 Normative references
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.
ISO 389-1, Acoustics — Reference zero for the calibration of audiometric equipment — Part 1: Reference
equivalent threshold sound pressure levels for pure tones and supra-aural earphones
ISO 4869-1, Acoustics — Hearing protectors — Part 1: Subjective method for the measurement of sound
attenuation
IEC 60318-1, Electroacoustics — Simulators of human head and ear — Part 1: Ear simulator for the
calibration of supra-aural earphones
IEC 60318-2:1998, Electroacoustics — Simulators of human head and ear — Part 2: An interim acoustic
coupler for the calibration of audiometric earphones in the extended high-frequency range
IEC 60645-2, Audiometers — Part 2: Equipment for speech audiometry
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 389-1, ISO 4869-1, IEC 60318-1
and IEC 60645-2 apply.
© ISO 2004 – All rights reserved 1

---------------------- Page: 5 ----------------------
ISO 389-8:2004(E)
4 Specifications
The reference equivalent threshold sound pressure levels depend on the model of earphone and on the
combination of the coupler or ear simulator and adapter used to calibrate it. Values for a closed-type
circumaural earphone, SENNHEISER HDA 200, using an ear simulator and adapter as specified in
IEC 60318-1
...

NORME ISO
INTERNATIONALE 389-8
Première édition
2004-05-15


Acoustique — Zéro de référence pour
l'étalonnage d'équipements
audiométriques —
Partie 8:
Niveaux de référence équivalents de
pression acoustique liminaire pour les
écouteurs à sons purs circumauraux
Acoustics — Reference zero for the calibration of audiometric
equipment —
Part 8: Reference equivalent threshold sound pressure levels for pure
tones and circumaural earphones




Numéro de référence
ISO 389-8:2004(F)
©
ISO 2004

---------------------- Page: 1 ----------------------
ISO 389-8:2004(F)
PDF – Exonération de responsabilité
Le présent fichier PDF peut contenir des polices de caractères intégrées. Conformément aux conditions de licence d'Adobe, ce fichier
peut être imprimé ou visualisé, mais ne doit pas être modifié à moins que l'ordinateur employé à cet effet ne bénéficie d'une licence
autorisant l'utilisation de ces polices et que celles-ci y soient installées. Lors du téléchargement de ce fichier, les parties concernées
acceptent de fait la responsabilité de ne pas enfreindre les conditions de licence d'Adobe. Le Secrétariat central de l'ISO décline toute
responsabilité en la matière.
Adobe est une marque déposée d'Adobe Systems Incorporated.
Les détails relatifs aux produits logiciels utilisés pour la création du présent fichier PDF sont disponibles dans la rubrique General Info
du fichier; les paramètres de création PDF ont été optimisés pour l'impression. Toutes les mesures ont été prises pour garantir
l'exploitation de ce fichier par les comités membres de l'ISO. Dans le cas peu probable où surviendrait un problème d'utilisation,
veuillez en informer le Secrétariat central à l'adresse donnée ci-dessous.


©  ISO 2004
Droits de reproduction réservés. Sauf prescription différente, aucune partie de cette publication ne peut être reproduite ni utilisée sous
quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit
de l'ISO à l'adresse ci-après ou du comité membre de l'ISO dans le pays du demandeur.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax. + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Publié en Suisse

ii © ISO 2004 – Tous droits réservés

---------------------- Page: 2 ----------------------
ISO 389-8:2004(F)
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux de
normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est en général confiée
aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude a le droit de faire partie du
comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l'ISO participent également aux travaux. L'ISO collabore étroitement avec
la Commission électrotechnique internationale (CEI) en ce qui concerne la normalisation électrotechnique.
Les Normes internationales sont rédigées conformément aux règles données dans les Directives ISO/CEI,
Partie 2.
La tâche principale des comités techniques est d'élaborer les Normes internationales. Les projets de Normes
internationales adoptés par les comités techniques sont soumis aux comités membres pour vote. Leur
publication comme Normes internationales requiert l'approbation de 75 % au moins des comités membres
votants.
L'attention est appelée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable de ne
pas avoir identifié de tels droits de propriété et averti de leur existence.
L'ISO 389-8 a été élaborée par le comité technique ISO/TC 43, Acoustique.
L'ISO 389 comprend les parties suivantes, présentées sous le titre général Acoustique — Zéro de référence
pour l'étalonnage d'équipements audiométriques:
 Partie 1: Niveaux de référence équivalents de pression acoustique liminaire pour les écouteurs à sons
purs supra-auraux
 Partie 2: Niveaux de référence équivalents de pression acoustique liminaire pour les écouteurs à sons
purs et à insertion
 Partie 3: Niveaux de référence équivalents de force liminaire pour les vibrateurs à sons purs et les
ossivibrateurs
 Partie 4: Niveaux de référence pour bruit de masque en bande étroite
 Partie 5: Niveaux de référence équivalents de pression acoustique liminaire pour les sons purs dans le
domaine de fréquences de 8 kHz à 16 kHz
 Partie 6: Niveaux de référence équivalents de pression acoustique liminaire pour signaux acoustiques
d'essai de courte durée
 Partie 7: Niveau liminaire de référence dans des conditions d'écoute en champ libre et en champ diffus
 Partie 8: Niveaux de référence équivalents de pression acoustique liminaire pour les écouteurs à sons
purs circumauraux
La Partie 9 est en préparation sous le titre: Conditions d'essai préférées pour la normalisation des niveaux de
référence équivalents de pression acoustique liminaire ou des niveaux de force vibratoires.
© ISO 2004 – Tous droits réservés iii

---------------------- Page: 3 ----------------------
ISO 389-8:2004(F)
Introduction
La présente partie de l'ISO 389 a été élaborée afin de rendre possible l'utilisation d'un même écouteur pour
une audiométrie à sons purs dans le domaine de fréquences allant de 125 Hz à 16 000 Hz. La présente partie
spécifie des valeurs de référence allant de 125 Hz à 8 000 Hz; l'ISO/TR 389-5, quant à elle, spécifie des
valeurs allant de 8 000 Hz à 16 000 HZ.
Les valeurs de référence sont fondées sur les informations fournies par des laboratoires de différents pays qui
représentent les données disponibles les plus fiables du moment.
Aujourd'hui, des valeurs de référence ne sont disponibles que pour un seul type d'écouteur circumaural, le
SENNHEISER HDA 200. Cet écouteur fournit un bon affaiblissement du bruit de fond et sa réponse
fréquentielle est sans résonances prononcées sur l'oreille humaine ou sur un simulateur d'oreille.

iv © ISO 2004 – Tous droits réservés

---------------------- Page: 4 ----------------------
NORME INTERNATIONALE ISO 389-8:2004(F)

Acoustique — Zéro de référence pour l'étalonnage
d'équipements audiométriques —
Partie 8:
Niveaux de référence équivalents de pression acoustique
liminaire pour les écouteurs à sons purs circumauraux
1 Domaine d'application
La présente partie de l'ISO 389 spécifie un niveau de référence équivalent de pression acoustique liminaire
(RETSPL) pour des sons purs dans le domaine de fréquences comprises entre 125 Hz et 8 kHz, applicables à
l'étalonnage des audiomètres en conduction aérienne équipés d'un modèle particulier d'écouteurs
circumauraux (SENNHEISER HDA 200).
NOTE Des commentaires et des références sur l'obtention et les conditions d'essai utilisées pour déterminer les
niveaux de référence recommandés sont donnés à l'Annexe A et dans la Bibliographie.
L'affaiblissement acoustique de l'écouteur est donné dans l'Annexe B. Les valeurs de correction du niveau de
sortie pour l'équivalence au champ libre pour l'écouteur des audiomètres vocaux de types A-E et B-E (voir
CEI 60645-2) sont données dans l'Annexe C.
2 Références normatives
Les documents de référence suivants sont indispensables pour l'application du présent document. Pour les
références datées, seule l'édition citée s'applique. Pour les références non datées, la dernière édition du
document de référence s'applique (y compris les éventuels amendements).
ISO 389-1, Acoustique — Zéro de référence pour l'étalonnage d'équipements audiométriques — Partie 1:
Niveaux de référence équivalents de pression acoustique liminaire pour les écouteurs à sons purs supra-
auraux
ISO 4869-1, Acoustique — Protecteurs individuels contre le bruit — Partie 1: Méthode subjective de
mesurage de l'affaiblissement acoustique
CEI 60318-1, Électroacoustique — Simulateurs de tête et d'oreille humaines — Partie 1: Simulateur d'oreille
pour l'étalonnage des écouteurs supra-auraux
CEI 60318-2:1998, Électroacoustique — Simulateurs de tête et d'oreille humaines — Partie 2: Coupleur
acoustique de remplacement pour l'étalonnage des écouteurs audiométriques dans le domaine des
fréquences élevées
CEI 60645-2, Audiomètres — Partie 2: Appareils pour l'audiométrie vocale
3 Termes et définitions
Pour les besoins du présent document, les termes et définitions donnés dans l'ISO 389-1, l'ISO 4869-1, la
CEI 60318-1 et la CEI 60645-2 s'appliquent.
© ISO 2004 – Tous droits réservés 1

---------------------- Page: 5 ----------------------
ISO 389-8:2004(F)
4 Spécifications
Les niveaux de référence équivalents de pression acoustique liminaire dépendent du modèle d'écouteur et de
la combinaison du coupleur ou du simulateur d'oreil
...

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

ISO
ISO 226:2023(Main)
Acoustics — Normal equal-loudness-level contours

This document specifies combinations of sound pressure levels and frequencies of pure continuous tones which are perceived as equally loud by human listeners. The specifications are based on the following conditions: a) the sound field in the absence of the listener consists of a free progressive plane wave; b) the source of sound is directly in front of the listener; c) the sound signals are pure tones; d) the sound pressure level is measured at the position where the centre of the listener's head would be, but in the absence of the listener; e) listening is binaural; f) the listeners are otologically normal persons in the age range from 18 years to 25 years inclusive. The data are given in graphical form in Annex A and in numerical form in Annex B for the preferred frequencies in the one-third-octave series from 20 Hz to 12 500 Hz, inclusive, in accordance with ISO 266.

  • Standard
    20 pages
    English language
    sale 15% off
  • Draft
    21 pages
    English language
    sale 15% off
  • Draft
    21 pages
    English language
    sale 15% off
ISO
ISO 8253-3:2022(Main)
Acoustics — Audiometric test methods — Part 3: Speech audiometry

This document specifies basic methods for speech recognition tests for audiological applications. NOTE Examples of speech materials are given in Annex A. In order to ensure minimum requirements of precision and comparability between different test procedures including speech recognition tests in different languages, this document specifies requirements for the composition, validation and evaluation of speech test materials, and the realization of speech recognition tests. This document does not specify the contents of the speech material because of the variety of languages. Furthermore, this document also specifies the determination of reference values and requirements for the realization and manner of presentation. In addition, there are features of speech tests described which are important to be specified, but which are not understood as a requirement. This document specifies procedures and requirements for speech audiometry with the recorded test material being presented by an audiometer through a transducer, e.g., an earphone, bone vibrator, or loudspeaker arrangement for sound field audiometry. Methods for using noise either for masking the non-test ear or as a competing sound are described. Some test subjects, for example children, can require modified test procedures not specified in this document. Specialized tests, such as those used for evaluating directional hearing and dichotic hearing, are outside the scope of this document.

  • Standard
    41 pages
    English language
    sale 15% off
  • Standard
    45 pages
    French language
    sale 15% off
  • Draft
    41 pages
    English language
    sale 15% off
  • Draft
    45 pages
    French language
    sale 15% off
ISO
ISO 11904-2:2021(Main)
Acoustics — Determination of sound immission from sound sources placed close to the ear — Part 2: Technique using a manikin

This document specifies basic framework measurement methods for sound immission from sound sources placed close to the ear. These measurements are carried out with a manikin, equipped with ear simulators including microphones. The measured values are subsequently converted into corresponding free-field or diffuse-field levels. The results are given as free-field related or diffuse-field related equivalent continuous A-weighted sound pressure levels. The technique is denoted the manikin technique. This document is applicable to exposure to sound from sources close to the ear, for example during equipment tests or at the workplace to sound from earphones or hearing protectors with audio communication facilities. This document is applicable in the frequency range from 20 Hz to 10 kHz. For frequencies above 10 kHz, ISO 11904-1 can be used.

  • Standard
    16 pages
    English language
    sale 15% off
  • Standard
    17 pages
    French language
    sale 15% off
  • Draft
    16 pages
    English language
    sale 15% off
  • Draft
    17 pages
    French language
    sale 15% off
ISO
ISO 389-7:2019(Main)
Acoustics — Reference zero for the calibration of audiometric equipment — Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions

This document specifies a reference threshold of hearing for the calibration of audiometric equipment used under the following conditions. a) The sound field in the absence of the listener consists of either a free progressive plane wave (free field) or a diffuse sound field, as specified in ISO 8253‑2. In the case of a free field, the source of sound is directly in front of the listener (frontal incidence). b) The sound signals are pure (sinusoidal) tones in the case of free-field conditions and one-third-octave bands of (white or pink) noise in the case of diffuse-field conditions. c) The sound pressure level is measured in the absence of the listener at the position where the centre of the listener's head would be. d) Listening is binaural. NOTE 1 Correction values for the threshold of hearing under free-field listening conditions and selected angles of sound incidence (45° and 90°) deviating from frontal incidence are given in ISO 8253-2 for information. NOTE 2 Other conditions are given in Reference [1]. The data are given in numerical form for the preferred frequencies in the one-third-octave series from 20 Hz to 16 000 Hz inclusive in accordance with ISO 266 and, in addition, for some intermediate audiometric frequencies up to 18 000 Hz. The threshold data differ from the audiometric zero specified in ISO 389‑1, ISO 389‑2, ISO 389‑5 and ISO 389‑8, since the latter refer to monaural listening through earphones with sound pressure levels referred to specified couplers and ear simulators. Direct comparison between the data in the parts of ISO 389 mentioned above and in this document is therefore not appropriate.

  • Standard
    11 pages
    English language
    sale 15% off
  • Standard
    11 pages
    French language
    sale 15% off
ISO
ISO 389-1:2017(Main)
Acoustics — Reference zero for the calibration of audiometric equipment — Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones

ISO 389-1:2017 specifies a standard reference zero for the scale of hearing threshold level applicable to pure-tone air conduction audiometers, to promote agreement and uniformity in the expression of hearing threshold level measurements throughout the world. ISO 389-1:2017 states the information in a form suitable for direct application to the calibration of audiometers, that is, in terms of the reference equivalent threshold sound pressure levels of generic supra-aural earphones specified in 4.2, measured on an ear simulator complying with IEC 60318‑1 and in terms of model-specific data given in two additional tables for the IEC 60318‑3 acoustic coupler and the IEC 60318‑1 ear simulator, respectively. The data are based on an assessment of the information available from the various standardizing laboratories responsible for audiometric standards and from scientific publications. Some notes on the application and derivation of the reference levels are given in Annexes A and B.

  • Standard
    10 pages
    English language
    sale 15% off
  • Standard
    10 pages
    French language
    sale 15% off
ISO
ISO 7029:2017(Main)
Acoustics — Statistical distribution of hearing thresholds related to age and gender

ISO 7029:2017 provides descriptive statistics of the hearing threshold deviation for populations of otologically normal persons of various ages under monaural earphone listening conditions. It specifies the following, for populations within the age limits from 18 years to 80 years for the range of audiometric frequencies from 125 Hz to 8 000 Hz: a) the expected median value of hearing thresholds given relative to the median hearing threshold at the age of 18 years; b) the expected statistical distribution above and below the median value. For the frequencies from 3 000 Hz to 8 000 Hz, the median and statistical distribution for populations above 70 years are presented for information only. ISO 7029:2017 also provides for information the expected median values at audiometric frequencies from 9 000 Hz to 12 500 Hz within the age limits from 22 years to 80 years.

  • Standard
    22 pages
    English language
    sale 15% off
  • Standard
    24 pages
    French language
    sale 15% off
ISO
ISO 389-3:2016(Main)
Acoustics — Reference zero for the calibration of audiometric equipment — Part 3: Reference equivalent threshold vibratory force levels for pure tones and bone vibrators

ISO 389-1:2016 specifies the following data applicable to the calibration of bone vibrators for pure-tone bone-conduction audiometry: a) reference equivalent threshold vibratory force levels (RETVFL), corresponding to the threshold of hearing of young otologically normal persons by bone-conduction audiometry; b) essential characteristics of the bone vibrator and the method of coupling to the test subject, and to the mechanical coupler; c) essential characteristics of the masking noise and the baseline masking noise level applied to the ear not under test. Guidance on the practical application of this part of ISO 389 in the calibration of audiometers is given in Annex B. RETVFL is the vibratory force level transmitted to a mechanical coupler of specified characteristics by a vibrator when applied to the mechanical coupler under stated conditions of test and when energized at the voltage level corresponding to the normal threshold of hearing for location on the mastoid prominence. NOTE 1 Values for the differences in reference equivalent threshold vibratory force levels between location on the forehead and mastoid are included for information in Annex C. NOTE 2 Recommended procedures for carrying out bone-conduction audiometry are specified in ISO 8253‑1.

  • Standard
    13 pages
    English language
    sale 15% off
  • Standard
    13 pages
    English language
    sale 15% off
  • Standard
    14 pages
    French language
    sale 15% off
  • Standard
    14 pages
    French language
    sale 15% off
ISO
ISO 1999:2013(Main)
Acoustics — Estimation of noise-induced hearing loss
SIST ISO 1999:2013

ISO 1999:2013 specifies a method for calculating the expected noise-induced permanent threshold shift in the hearing threshold levels of adult populations due to various levels and durations of noise exposure; it provides the basis for calculating hearing disability according to various formulae when the hearing threshold levels at commonly measured audiometric frequencies, or combinations of such frequencies, exceed a certain value. The measure of exposure to noise for a population at risk is the noise exposure level normalized to a nominal 8 h working day, LEX,8h, for a given number of years of exposure. ISO 1999:2013 applies to noise at frequencies less than approximately 10 kHz which is steady, intermittent, fluctuating, irregular. Use of ISO 1999:2013 for sound pressures exceeding 200 Pa (140 dB relative to 20 µPa) is recognized as extrapolation.

  • Standard
    26 pages
    English language
    sale 15% off
  • Standard
    23 pages
    English language
    sale 15% off
  • Standard
    29 pages
    English language
    sale 10% off
    e-Library read for
    1 day
  • Draft
    31 pages
    English language
    sale 10% off
    e-Library read for
    1 day
ISO
ISO 28961:2012(Main)
Acoustics — Statistical distribution of hearing thresholds of otologically normal persons in the age range from 18 years to 25 years under free-field listening conditions

ISO 28961:2012 provides descriptive statistics, percentiles, of the hearing threshold distribution whose mean is the reference threshold value specified in ISO 226 and ISO 389-7. The mean and percentile thresholds are specified under the following conditions: a) the sound field in the absence of the listener consists of a free progressive plane wave (free field); b) the sound source is directly in front of the listener (frontal incidence); c) the sound signals are pure (sinusoidal) tones; d) the sound pressure level is measured in the absence of the listener at the position where the centre of the listener's head would be; e) listening is binaural; f) the listeners are otologically normal persons within the age range 18 years to 25 years inclusive. The percentiles are given in numerical form for the preferred frequencies in the one-third-octave series from 20 Hz to 16 000 Hz inclusive, in accordance with ISO 266, and for some intermediate audiometric frequencies. The percentiles are applicable to the assessment of an individual's hearing in relation to the distribution of hearing thresholds under the above conditions. The percentiles can also be used to evaluate the audibility of low-level noise around hearing threshold.

  • Standard
    12 pages
    English language
    sale 15% off
ISO
ISO 8253-1:2010(Main)
Acoustics — Audiometric test methods — Part 1: Pure-tone air and bone conduction audiometry

ISO 8253-1:2010 specifies procedures and requirements for pure-tone air conduction and bone conduction threshold audiometry. For screening purposes, only pure-tone air conduction audiometric test methods are specified. It is possible that the procedures are not appropriate for special populations, e.g. very young children. ISO 8253-1:2010 does not cover audiometric procedures to be carried out at levels above the hearing threshold levels of the subjects. Procedures and requirements for speech audiometry, electrophysiological audiometry, and where loudspeakers are used as a sound source are not specified.

  • Standard
    29 pages
    English language
    sale 15% off
  • Standard
    31 pages
    French language
    sale 15% off