EN ISO 389-4:1998

Acoustics - Reference zero for the calibration of audiometric equipment - Part 4: Reference levels for narrow-band masking noise (ISO 389-4:1994)

Specifies reference levels for narrow-band masking noise presented by air conduction from an earphone in pure-tone audiometry. The data are given in terms of levels to be added to the reference equivalent threshold sound pressure levels for the corresponding pure-tone frequencies. Data are given for noise bandwidths of one-third and one-half octaves.

Akustik - Standard-Bezugspegel für die Kalibrierung audiometrischer Geräte - Teil 4: Bezugspegel für schmalbandige Verdeckungsgeräusche (ISO 389-4:1994)

Dieser Teil der ISO 389 legt Bezugspegel für schmalbandige Verdeckungsgeräusche fest, die in der Reinton-Audiometrie von einem Kopfhörer über Luftleitung dargeboten werden. Die Daten sind als Pegel angegeben, die den äquivalenten Bezugsschwellenschalldruckpegeln, diese sind in ISO 389:1991 beziehungsweise ISO 389-2 festgelegt, für die zugehörigen Reinton-Frequenzen hinzuzurechnen sind, wenn der Verdeckungskopfhörer an dem vorgeschriebenen akustischen Kuppler, Ohrsimulator oder künstlichen Ohr kalibriert wird. Es sind Daten für Geräuschbandbreiten von einer drittel oder einer halben Oktave angegeben.

Acoustique - Zéro de référence pour l'étalonnage d'équipements audiométriques - Partie 4: Niveaux de référence pour bruit de masque en bande étroite (ISO 389-4:1994)

Akustika - Referenčna ničla za umerjanje avdiometrov - 4. del: Referenčne ravni za ozkopasovni maskirni hrup (ISO 389-4:1994)

General Information

• Status: Published
• Publication Date: 15-Dec-1998
• ICS: 13.140 - Noise with respect to human beings
• Technical Committee: CEN/TC 211 - Acuostics
• Drafting Committee: CEN/TC 211 - Acuostics
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 01-Dec-2005
• Completion Date: 01-Dec-2005
• Ref Project: SIST EN ISO 389-4:1999 - Acoustics - Reference zero for the calibration of audiometric equipment - Part 4: Reference levels for narrow-band masking noise (ISO 389-4:1994)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 389-4:1999
01-november-1999
$NXVWLND5HIHUHQþQDQLþOD]DXPHUMDQMHDYGLRPHWURYGHO5HIHUHQþQHUDYQL]D
R]NRSDVRYQLPDVNLUQLKUXS,62
Acoustics - Reference zero for the calibration of audiometric equipment - Part 4:
Reference levels for narrow-band masking noise (ISO 389-4:1994)
Akustik - Standard-Bezugspegel für die Kalibrierung audiometrischer Geräte - Teil 4:
Bezugspegel für schmalbandige Verdeckungsgeräusche (ISO 389-4:1994)
Acoustique - Zéro de référence pour l'étalonnage d'équipements audiométriques - Partie
4: Niveaux de référence pour bruit de masque en bande étroite (ISO 389-4:1994)
Ta slovenski standard je istoveten z: EN ISO 389-4:1998
ICS:
13.140 Vpliv hrupa na ljudi Noise with respect to human
beings
SIST EN ISO 389-4:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 389-4:1999

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SIST EN ISO 389-4:1999

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SIST EN ISO 389-4:1999

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SIST EN ISO 389-4:1999

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SIST EN ISO 389-4:1999

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SIST EN ISO 389-4:1999
INTERNATIONAL
ISO
STANDARD
389-4
First edition
1994-10-01
Acoustics - Reference zero for the
calibration of audiometric equipment -
Part 4:
Reference levels for narrow-band masking
nolse
Acoustique - Zero de rGf&ence pour I ’tStalonnage d ’equipements
a udiom6 triques -
Partie 4: Niveaux de r&f&ence pour bruit de masque en bande 6troite
Reference number
ISO 389-4:1994(E)

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SIST EN ISO 389-4:1999
ISO 389-4: 1994(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. Esch 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.
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.
International Standard ISO 389-4 was prepared by Technical Committee
ISO/TC 43, Acoustics.
This first edition of ISO 389-4 cancels and replaces ISO 8798:1987, of
which it constitutes a minor revision.
ISO 389 consists of the following Parts, under the general title Acoustics
- ßeference zero for the calibration of audiometric equipment:
- Part 7: ßeference equivalent threshold Sound pressure levels for
pure tones and supra-aural earphones
- Part 2: ßeferen ce equivalent thre shold Sound press ure levels
for
pure tones and insert earphones
- Part 3: ßeference equivalent threshold forte levels for pure tones
and bone Vibrators
- Part 4: ßeference levels for narrow-band masking noise
- Part 5: ßeference equivalent threshold Sound pressure levels for
pure tones in the frequency range 8 kHz to 16 kHz
- Part 6: ßeference equivalent threshold Sound pressure levels for
acoustic test Signals of short duration
0 ISO 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopying and
microfilm, without Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland
ii

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SIST EN ISO 389-4:1999
0 ISO ISO 389-4: 1994(E)
- Part 7: Reference threshold of hearing under free-field and diffuse-
field lis tening conditions
Part 1 will be a re-issue of ISO 389:1991.
Annexes A and B of this part of ISO 389 are for information only.

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SIST EN ISO 389-4:1999
0 ISO
ISO 389-4: 1994(E)
Introduction
ISO 389:1991 (to be re-issued as ISO 389-1) and ISO 389-2 specify the
reference zero for the calibration of pure-tone air-conduction audiometers.
ISO 389-3 specifies the corresponding data for pure-tone bone-conduction
audiometers.
For clinical diagnostic and other audiometric purposes, it is often necess-
at-y to prevent the test Signal being heard through the ear not being tested.
This masking is usually achieved by the presentation of a
...