SIST EN ISO 389-7:2006
(Main)Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions (ISO 389-7:2005)
Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions (ISO 389-7:2005)
This part of ISO 389 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; e) The other conditions are as far as possible those specified in [1] in the Bibliography. 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. It should be emphasised that the threshold data differ from the audiometric zero specified in ISO 389-1, ISO 389-2, ISO/TR 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 part of ISO 389 is therefore not appropriate.
Akustik - Standard-Bezugspegel für die Kalibrierung von audiometrischen Geräten Teil 7: Bezugshörschwellen unter Freifeld- und Diffusfeldbedingungen (ISO 389-7:2005)
Dieser Teil von ISO 389 legt eine Bezugshörschwelle zur Kalibrierung audiometrischer Geräte fest, die unter den folgenden Bedingungen benutzt werden:
a) Das Schallfeld besteht bei Abwesenheit des Hörers entweder aus einer sich frei ausbreitenden ebenen Welle (Freifeld) oder ist ein diffuses Schallfeld. Im Falle der ebenen sich frei ausbreitenden Schallwelle gelten die Festlegungen in ISO 8253-2 und die Schallquelle befindet sich direkt vor dem Hörer (frontaler Schalleinfall).
b) Die Schallsignale sind reine (Sinus-)Töne im Falle der Freifeldbedingungen sowie terzbandbreites (weißes oder rosa) Rauschen im Falle der Diffusfeldbedingungen.
c) Der Schalldruckpegel wird in Abwesenheit des Hörers an der Position des Mittelpunktes des Kopfes des Hörers gemessen.
d) Das Hören erfolgt binaural.
ANMERKUNG 1 Korrektionswerte für die Freifeld-Hörschwelle bei ausgewählten, vom frontalen Schalleinfall abweichenden Einfallswinkeln (45° und 90°) sind zur Information in ISO 8253-2 angegeben.
ANMERKUNG 2 Die anderen Bedingungen entsprechen so weit wie möglich denen aus [1] im Literaturverzeichnis.
Die Daten sind als Zahlenwerte für die Vorzugsfrequenzen in Terzen von 20 Hz bis 16 000 Hz nach ISO 266 und zusätzlich für einige audiometrische Zwischenfrequenzen bis 18 000 Hz angegeben.
Es sollte hervorgehoben werden, dass die Hörschwellendaten von den in ISO 389-1, ISO 389-2, ISO/TR 389 5 und ISO 389-8 angegebenen audiometrischen Standard-Bezugspegeln abweichen, da die letzteren für monaurales Hören mit Kopfhörern gelten und sich auf festgelegte Kuppler und Ohrsimulatoren beziehen. Deshalb ist ein direkter Vergleich zwischen den Daten in den o. g. Teilen von ISO 389 und in diesem Teil von ISO 389 nicht möglich.
Acoustique - Zéro de référence pour l'étalonnage d'équipements audiométriques - Partie 7: Niveau liminaire de référence dans des conditions d'écoute en champ libre et en champ diffus (ISO 389-7:2005)
L'ISO 389-7:2005 spécifie un seuil d'audition de référence pour l'étalonnage des équipements audiométriques utilisés dans les conditions suivantes.
Le champ acoustique en l'absence de l'auditeur consiste soit en une onde plane progressive libre (champ libre), soit en un champ acoustique diffus, tel qu'il est spécifié dans l'ISO 8253-2. Dans le cas d'un champ libre, la source sonore se trouve directement en face de l'auditeur (incidence frontale).
Les signaux sonores sont des sons purs (sinusoïdaux) dans le cas des conditions en champ libre et des bandes de tiers d'octave de bruit (blanc ou rose) dans le cas des conditions en champ diffus.
Le niveau de pression acoustique est mesuré, en l'absence de l'auditeur, à la position qu'aurait dû occuper le centre de sa tête.
L'écoute est binaurale.
Les données dans l'ISO 389-7:2005 sont présentées sous forme numérique pour les fréquences normales dans la série du tiers d'octave de 20 Hz à 16 000 Hz inclus, conformément à l'ISO 266 et, en plus, pour certaines fréquences audiométriques intermédiaires jusqu'à 18 000 Hz.
Il convient de souligner que les données concernant le seuil d'audition diffèrent du zéro audiométrique spécifié dans l'ISO 389-1, l'ISO 389-2, l'ISO/TR 389-5 et l'ISO 389-8, étant donné que ces dernières concernent l'écoute monaurale par écouteurs, les niveaux de pression acoustique étant mesurés sur des coupleurs et des oreilles artificielles spécifiés. Une comparaison directe entre les données figurant dans les parties de l'ISO 389 mentionnées plus haut et les données de la présente partie de l'ISO 389 n'est donc pas appropriée.
Akustika – Referenčna ničla za umerjanje avdiometrov – 7. del: Referenčni prag slišnosti v razmerah prostega in difuznega zvočnega polja (ISO 389-7:2005)
Ta del standarda ISO 389 določa referenčni prag slišnosti za umerjanje avdiometrov, uporabljenih v naslednjih razmerah: a) zvočno polje v odsotnosti poslušalca je sestavljeno iz prostega napredujočega ravnega vala (prosto polje) ali difuznega zvočnega polja, kot je opredeljeno v standardu ISO 8253-2. V primeru prostega polja je vir zvoka neposredno pred poslušalcem (frontalna pojavnost); b) zvokovni signali so čisti (sinusoidni) toni v primeru prostega zvočnega polja ter tretjinski oktavni pasovi (belega ali rožnatega) šuma v primeru difuznega zvočnega polja; c) raven zvočnega tlaka je izmerjena v odsotnosti poslušalca na položaju, kjer bi bil osrednji del poslušalčeve glave; d) poslušanje je binavralno; e) drugi pogoji so, kot je mogoče, pogoji, opredeljeni v [1] bibliografiji. Podatki so podani v numerični obliki za prednostne frekvence v tretjinskih oktavnih pasovih od 20 Hz do vključno 16.000 Hz v skladu s standardom ISO 266 in dodatno za nekatere vmesne avdiometrične frekvence do 18.000 Hz. Treba je poudariti, da se podatki o pragu razlikujejo od avdiometrične ničle, opredeljene v standardih ISO 389-1, ISO 389-2, ISO/TR 389-5 in ISO 389-8, saj se slednje nanašajo na monavralno poslušanje prek slušalk z ravnmi zvočnega tlaka, ki se nanašajo na navedene spojnike in simulatorje ušesa. Neposredna primerjava podatkov v zgoraj omenjenih delih standarda ISO 389 in v tem delu standarda ISO 389 zato ni ustrezna.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 389-7:2006
01-februar-2006
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SIST EN ISO 389-7:1999
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Acoustics - Reference zero for the calibration of audiometric equipment - Part 7:
Reference threshold of hearing under free-field and diffuse-field listening conditions (ISO
389-7:2005)
Akustik - Standard-Bezugspegel für die Kalibrierung von audiometrischen Geräten Teil 7:
Bezugshörschwellen unter Freifeld- und Diffusfeldbedingungen (ISO 389-7:2005)
Acoustique - Zéro de référence pour l'étalonnage d'équipements audiométriques - Partie
7: Niveau liminaire de référence dans des conditions d'écoute en champ libre et en
champ diffus (ISO 389-7:2005)
Ta slovenski standard je istoveten z: EN ISO 389-7:2005
ICS:
13.140 Vpliv hrupa na ljudi Noise with respect to human
beings
SIST EN ISO 389-7:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 389-7:2006
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SIST EN ISO 389-7:2006
EUROPEAN STANDARD
EN ISO 389-7
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2005
ICS 13.140 Supersedes EN ISO 389-7:1998
English Version
Acoustics - Reference zero for the calibration of audiometric
equipment - Part 7: Reference threshold of hearing under free-
field and diffuse-field listening conditions (ISO 389-7:2005)
Acoustique - Zéro de référence pour l'étalonnage Akustik - Standard-Bezugspegel für die Kalibrierung von
d'équipements audiométriques - Partie 7: Niveau liminaire audiometrischen Geräten - Teil 7: Bezugshörschwellen
de référence dans des conditions d'écoute en champ libre unter Freifeld- und Diffusfeldbedingungen (ISO 389-7:2005)
et en champ diffus (ISO 389-7:2005)
This European Standard was approved by CEN on 28 October 2005.
CEN 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 Central Secretariat or to any CEN 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 CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 389-7:2005: E
worldwide for CEN national Members.
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SIST EN ISO 389-7:2006
EN ISO 389-7:2005 (E)
Foreword
This document (EN ISO 389-7:2005) has been prepared by Technical Committee ISO/TC 43
"Acoustics" in collaboration with Technical Committee CEN/TC 211 "Acoustics", the secretariat
of which is held by DS.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by May 2006, and conflicting national standards
shall be withdrawn at the latest by May 2006.
This document supersedes EN ISO 389-7:1998.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Endorsement notice
The text of ISO 389-7:2005 has been approved by CEN as EN ISO 389-7:2005 without any
modifications.
2
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SIST EN ISO 389-7:2006
INTERNATIONAL ISO
STANDARD 389-7
Second edition
2005-11-01
Acoustics — Reference zero for the
calibration of audiometric equipment —
Part 7:
Reference threshold of hearing under
free-field and diffuse-field listening
conditions
Acoustique — Zéro de référence pour l'étalonnage d'équipements
audiométriques —
Partie 7: Niveau liminaire de référence dans des conditions d'écoute en
champ libre et en champ diffus
Reference number
ISO 389-7:2005(E)
©
ISO 2005
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SIST EN ISO 389-7:2006
ISO 389-7:2005(E)
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ii © ISO 2005 – All rights reserved
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SIST EN ISO 389-7:2006
ISO 389-7:2005(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 389-7 was prepared by Technical Committee ISO/TC 43, Acoustics.
This second edition cancels and replaces the first edition (ISO 389-7:1996), which has been technically
revised.
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 hearing threshold levels for 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
© ISO 2005 – All rights reserved iii
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SIST EN ISO 389-7:2006
ISO 389-7:2005(E)
Introduction
In some audiological applications the test signals are delivered by means of loudspeakers, either in a free
sound field or in a diffuse sound field. This part of ISO 389 specifies the reference zero for the calibration of
audiometric equipment used for sound field audiometry. Corresponding audiometric test methods are
specified in ISO 8253-1 and ISO 8253-2.
In common with other subjective phenomena, the threshold of hearing varies in detail from person to person
but, for a group of otologically normal persons within a restricted age range, values for the central tendency
can be determined to characterize the group. This and other parts of ISO 389 specify threshold data
applicable to otologically normal persons in the age range from 18 years to 25 years.
The data specified in this part of ISO 389 relate to
a) pure tones heard under conditions of binaural listening in free progressive plane waves with the subject
directly facing the source of sound (frontal incidence), and with the sound pressure level measured in the
free progressive wave at the centre position of the listener's head with the listener absent;
b) one-third-octave bands of (white or pink) noise heard under conditions of binaural listening in a diffuse
sound field with the sound pressure level measured in the sound field at the centre position of the
listener's head with the listener absent.
For frequencies up to 8 kHz, each set of data may be equally applied to any other bands of (white or pink)
noise for which the bandwidth is less than the critical bandwidth.
The data are based on an assessment of technical information provided by laboratories in different countries
representing the most reliable data available at the time. For information, a note on the derivation of the
reference values and the origin of the data is given in Annex A.
iv © ISO 2005 – All rights reserved
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SIST EN ISO 389-7:2006
INTERNATIONAL STANDARD ISO 389-7:2005(E)
Acoustics — Reference zero for the calibration of audiometric
equipment —
Part 7:
Reference threshold of hearing under free-field and diffuse-field
listening conditions
1 Scope
This part of ISO 389 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 Bibliographic 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.
It should be emphasized that the threshold data differ from the audiometric zero specified in ISO 389-1,
ISO 389-2, ISO/TR 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 part of ISO 389 is therefore not appropriate.
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 8253-2, Acoustics — Audiometric test methods — Part 2: Sound field audiometry with pure tone and
narrow-band test signals
© ISO 2005 – All rights reserved 1
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SIST EN ISO 389-7:2006
ISO 389-7:2005(E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
threshold of hearing
level of a sound at which, under specified conditions, a person gives 50 % of correct detection responses on
repeated trials
NOTE The results of threshold determination depend to a certain degree on the test procedure used. The data
presented in the ISO 389 series are all based on the use of the threshold test procedures defined in ISO 8253-1. When a
test procedure with other characteristics is used, di
...
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