Akustik Audiometri Del 1: Toneaudiometri

Transcription

1 Dansk standard DS/EN ISO udgave Akustik Audiometri Del 1: Toneaudiometri Acoustics Audiometric test methods Part 1: Pure-tone air and bone conduction audiometry

2 DS/EN ISO København DS projekt: M ICS: Første del af denne publikations betegnelse er: DS/EN ISO, hvilket betyder, at det er en international standard, der har status både som europæisk og dansk standard. Denne publikations overensstemmelse er: IDT med: ISO :2010. IDT med: EN ISO :2010. DS-publikationen er på engelsk. Denne publikation erstatter: DS/EN ISO :1998, DS/EN 26189:1993, DS/ISO 6189:1984 og DS/ISO :1991. DS-publikationstyper Dansk Standard udgiver forskellige publikationstyper. Typen på denne publikation fremgår af forsiden. Der kan være tale om: Dansk standard standard, der er udarbejdet på nationalt niveau, eller som er baseret på et andet lands nationale standard, eller standard, der er udarbejdet på internationalt og/eller europæisk niveau, og som har fået status som dansk standard DS-information publikation, der er udarbejdet på nationalt niveau, og som ikke har opnået status som standard, eller publikation, der er udarbejdet på internationalt og/eller europæisk niveau, og som ikke har fået status som standard, fx en teknisk rapport, eller europæisk præstandard DS-håndbog samling af standarder, eventuelt suppleret med informativt materiale DS-hæfte publikation med informativt materiale Til disse publikationstyper kan endvidere udgives tillæg og rettelsesblade DS-publikationsform Publikationstyperne udgives i forskellig form som henholdsvis fuldtekstpublikation (publikationen er trykt i sin helhed) godkendelsesblad (publikationen leveres i kopi med et trykt DS-omslag) elektronisk (publikationen leveres på et elektronisk medie) DS-betegnelse Alle DS-publikationers betegnelse begynder med DS efterfulgt af et eller flere præfikser og et nr., fx DS 383, DS/EN 5414 osv. Hvis der efter nr. er angivet et A eller Cor, betyder det, enten at det er et tillæg eller et rettelsesblad til hovedstandarden, eller at det er indført i hovedstandarden. DS-betegnelse angives på forsiden. Overensstemmelse med anden publikation: Overensstemmelse kan enten være IDT, EQV, NEQ eller MOD IDT: Når publikationen er identisk med en given publikation. EQV: Når publikationen teknisk er i overensstemmelse med en given publikation, men præsentationen er ændret. NEQ: Når publikationen teknisk eller præsentationsmæssigt ikke er i overensstemmelse med en given standard, men udarbejdet på baggrund af denne. MOD: Når publikationen er modificeret i forhold til en given publikation.

3 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN ISO November 2010 ICS Supersedes EN 26189:1991, EN ISO :1998 English Version Acoustics - Audiometric test methods - Part 1: Pure-tone air and bone conduction audiometry (ISO :2010) Acoustique - Méthodes d'essais audiométriques - Partie 1: Audiométrie à sons purs en conduction aérienne et en conduction osseuse (ISO :2010) This European Standard was approved by CEN on 25 September Akustik - Audiometrische Prüfverfahren - Teil 1: Grundlegende Verfahren der Luft- und Knochenleitungs- Schwellenaudiometrie mit reinen Tönen (ISO :2010) 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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO :2010: E

4 EN ISO :2010 (E) Contents Page Foreword...3 2

5 EN ISO :2010 (E) Foreword This document (EN ISO :2010) 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 2011, and conflicting national standards shall be withdrawn at the latest by May Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 26189:1991 and EN ISO :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, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO :2010 has been approved by CEN as a EN ISO :2010 without any modification. 3

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7 INTERNATIONAL STANDARD ISO Second edition Acoustics Audiometric test methods Part 1: Pure-tone air and bone conduction audiometry Acoustique Méthodes d'essais audiométriques Partie 1: Audiométrie à sons purs en conduction aérienne et en conduction osseuse Reference number ISO :2010(E) ISO 2010

8 ISO :2010(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. COPYRIGHT PROTECTED DOCUMENT ISO 2010 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 Fax copyright@iso.org Web Published in Switzerland ii ISO 2010 All rights reserved

9 ISO :2010(E) Contents Page Foreword...v Introduction...vi 1 Scope Normative references Terms and definitions General aspects of audiometric measurements General Standard reference zero for the calibration of audiometric equipment Requirements on audiometric equipment Qualified tester Test time Conditions for audiometric test environments Measurement uncertainty Preparation and instruction of test subjects before audiometric testing and positioning of transducers Preparation of test subjects Instruction of test subjects Placement of transducers Air conduction hearing threshold level determinations using fixed-frequency audiometry General Manually controlled threshold determination Hearing threshold determination with an automatic recording audiometer Computer-controlled threshold determination Air conduction hearing threshold level determinations using sweep-frequency audiometry General Presentation of test tone Familiarization Hearing threshold level measurement Calculation of hearing threshold level at a specified frequency Bone conduction hearing threshold audiometry Method of audiometry Occlusion Airborne sound radiation from the bone vibrator Vibrotactile sensation Procedures for testing with masking in bone conduction audiometry Screening audiometry General Procedure for the screening test Audiograms Permissible ambient noise Permissible ambient noise for threshold determinations Psycho-acoustic check on ambient noise Maintenance and calibration of audiometric equipment General Intervals between checks...20 ISO 2010 All rights reserved iii

10 ISO :2010(E) 12.3 Stage A Routine checking and subjective tests Stage B Periodic objective checks Stage C Basic calibration tests Annex A (informative) Measurement uncertainty Bibliography iv ISO 2010 All rights reserved

11 ISO :2010(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 was prepared by Technical Committee ISO/TC 43, Acoustics. This second edition cancels and replaces the first edition (ISO :1989) and ISO 6189:1983, which have been technically revised. ISO 8253 consists of the following parts, under the general title Acoustics Audiometric test methods: Part 1: Pure-tone air and bone conduction audiometry Part 2: Sound field audiometry with pure-tone and narrow-band test signals Part 3: Speech audiometry ISO 2010 All rights reserved v

12 ISO :2010(E) Introduction This International Standard specifies requirements and procedures for carrying out basic audiometric tests in which pure tones are presented to the test subject using earphones or bone vibrators. Electrophysiological test methods are not included. In order to obtain a reliable measure of hearing ability, many factors are involved. IEC specifies requirements for audiometers. It is essential that audiometric equipment, when in service, be checked and the calibration maintained. This part of ISO 8253 outlines a calibration scheme. To avoid masking of the test signal by ambient noise in the audiometric test room, the levels of the ambient noise shall not exceed certain values, depending upon the method of signal presentation to the test subject, i.e. by different earphones or by bone vibrator. This part of ISO 8253 gives maximum permissible ambient sound pressure levels which shall not be exceeded when hearing threshold levels down to 0 db have to be measured. It indicates the maximum ambient sound pressure levels which are permissible when other minimum hearing threshold levels require measurement. It sets out procedures for determining hearing threshold levels by pure-tone air conduction and bone conduction audiometry. For screening purposes, only methods for air conduction audiometry are outlined. Audiometry can be performed by using: a) a manual audiometer; b) an automatic recording audiometer; c) computer-controlled audiometric equipment. Methods for threshold audiometry are given for these three types of signal presentation. For screening purposes, only methods using a manual or a computer-controlled audiometer are set out. The procedures are applicable to the majority of adults and children. Other procedures may yield results equivalent to those derived by the procedures specified in this part of ISO For very young, aged or sick people, some modification of the recommended procedures is likely to be required. This may result in a less accurate measurement of hearing. vi ISO 2010 All rights reserved

13 INTERNATIONAL STANDARD ISO :2010(E) Acoustics Audiometric test methods Part 1: Pure-tone air and bone conduction audiometry 1 Scope This part of ISO 8253 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. This part of ISO 8253 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. 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 389-2, Acoustics Reference zero for the calibration of audiometric equipment Part 2: Reference equivalent threshold sound pressure levels for pure tones and insert earphones ISO 389-3:1994, Acoustics Reference zero for the calibration of audiometric equipment Part 3: Reference equivalent threshold force levels for pure tones and bone vibrators ISO 389-5, Acoustics Reference zero for the calibration of audiometric equipment Part 5: Reference equivalent threshold sound pressure levels for pure tones in the frequency range 8 khz to 16 khz ISO 389-8, Acoustics Reference zero for the calibration of audiometric equipment Part 8: Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones IEC :2001, Electroacoustics Audiological equipment Part 1: Pure-tone audiometers IEC 61260, Electroacoustics Octave-band and fractional-octave-band filters IEC , Electroacoustics Sound level meters Part 1: Specifications ISO/IEC Guide 98-3, Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) ISO 2010 All rights reserved 1