1、BS EN ISO 24504:2016Ergonomics Accessibledesign Sound pressure levelsof spoken announcements forproducts and public addresssystems (ISO 24504:2014)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 24504:2016 BRITISH STANDARDNational forewordThis British Stand
2、ard is the UK implementation of EN ISO24504:2016. It is identical to ISO 24504:2014.The UK participation in its preparation was entrusted to TechnicalCommittee PH/9/-/1, Ergonomics of the physical environment.A list of organizations represented on this committee can beobtained on request to its secr
3、etary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 90124 9ICS 13.180Compliance with a British Standard cannot conf
4、er immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2016.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 24504 June 2016 ICS 13.180 English Ver
5、sion Ergonomics - Accessible design - Sound pressure levels of spoken announcements for products and public address systems (ISO 24504:2014) Ergonomie - Conception accessible - Niveaux de pression acoustique des annonces vocales pour les produits et systmes de sonorisation (ISO 24504:2014) Ergonomie
6、 - Barrierefreie Gestaltung - Schalldruckpegel von gesprochenen Ansagen fr Produkte und ffentliche Lautsprecheranlagen (ISO 24504:2014) This European Standard was approved by CEN on 27 May 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions
7、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 th
8、ree 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 b
9、odies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
10、 Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved world
11、wide for CEN national Members. Ref. No. EN ISO 24504:2016 EBS EN ISO 24504:2016EN ISO 24504:2016 (E) 3 European foreword The text of ISO 24504:2014 has been prepared by Technical Committee ISO/TC 159 “Ergonomics” of the International Organization for Standardization (ISO) and has been taken over as
12、EN ISO 24504:2016 by Technical Committee CEN/TC 122 “Ergonomics” the secretariat of which is held by DIN. 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 December 2016, and conflicting national st
13、andards shall be withdrawn at the latest by December 2016. 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. According to the CEN-CENELE
14、C 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Icel
15、and, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 24504:2014 has been approved by CEN as EN ISO 24504:2016 without any modificati
16、on. BS EN ISO 24504:2016ISO 24504:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 24 Symbols 45 Range of sound pressure level of spoken announcements . 45.1 General . 45.2 Criteria to determine the speech leve
17、l 55.3 Relevant factors related to speech perception 55.4 A-weighted sound pressure level method to determine the speech level .65.5 Simplified STI method to determine the minimum speech level 7Annex A (normative) Method for measuring the sound pressure level of spoken announcements and ambient nois
18、e . 8Annex B (informative) Effects of age-related hearing loss on word recognition .10Annex C (informative) Examples of measurement condition and result records .16Annex D (informative) STI method to determine minimum speech level 18Bibliography .21BS EN ISO 24504:2016ISO 24504:2014(E)ForewordISO (t
19、he 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 commit
20、tee 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 electrotech
21、nical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted
22、in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). 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
23、. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitut
24、e an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committ
25、ee responsible for this document is ISO/TC 159, Ergonomics, Subcommittee SC 5, Ergonomics of the physical environment.iv ISO 2014 All rights reservedBS EN ISO 24504:2016ISO 24504:2014(E)IntroductionToday, people conduct their daily lives along with spoken announcements from various products such as
26、home electrical appliances, information and telecommunication products, office-automation equipment, heating equipment, toys, sanitary equipment, and health care products. Some products use spoken announcements to provide instructions in indoor and outdoor public areas such as ticket vending machine
27、s, elevators, and escalators. Public address systems are often installed to provide spoken announcements. Such announcements can be indistinct to listeners because of hearing loss that can occur with ageing or because of ambient noise in the surroundings.This International Standard specifies methods
28、 for determining an appropriate sound level range of spoken announcements so that all listeners, including people with age-related hearing loss, can hear them properly against ambient noises. This sound level range specification was determined based on results of experiments in which people of diffe
29、rent ages participated. Spoken announcements for which sound pressure levels are within the range specified in this International Standard are expected to be audible and comfortably loud for most users in the presence of ambient noise.This International Standard is intended to be applied as necessar
30、y to products depending on the product type and its conditions of use. It does not apply to spoken announcements used for evacuation or emergency purposes.ISO 9921 specifies recommended levels of speech-communication quality necessary for conveying comprehensive messages in different applications. T
31、herefore, ISO 9921 differs from this International Standard.This International Standard adopts the principles of accessible design from ISO/IEC Guide 71, which are amplified in ISO/TR 22411. ISO 2014 All rights reserved vBS EN ISO 24504:2016BS EN ISO 24504:2016Ergonomics Accessible design Sound pres
32、sure levels of spoken announcements for products and public address systems1 ScopeThis International Standard specifies methods to determine an appropriate sound pressure level range for spoken announcements in environments where ambient noise is less than 80 dB. The specified methods follow the con
33、cepts of ISO/IEC Guide 71 and includes consideration of older persons with decreased hearing ability to determine sound pressure levels of spoken announcements. The spoken speech levels that are specified in this International Standard are for products and public-address systems. To improve the acce
34、ssibility and usability of products, spoken announcements must not only be audible but also presented at comfortable speech levels.The target products that present spoken announcements are consumer products such as electronic home appliances, information and communication technology services, and pr
35、oducts providing services for general users in public facilities indoors and outdoors such as train stations, airports, meeting rooms, amusement parks, and fairs.This International Standard is not applicable to products providing private information such as automated teller machines in public spaces
36、.This International Standard is applicable when a loudspeaker producing a spoken announcement is located a short distance from the user in an environment where the sound pressure level with a standard frequency weighting A of ambient noise does not exceed 80 dB. This International Standard is applic
37、able to spoken announcements that are audible to persons with normal hearing for their age when presented by a target product under quiet and anechoic conditions. This International Standard is applicable for both recorded voice and synthetic speech announcements.This International Standard does not
38、 specify sound pressure levels of spoken announcements for systems with automatic sound pressure level control to compensate for fluctuating ambient noise levels. This International Standard is not applicable to spoken announcements heard through headphones or earphones, or to spoken announcements h
39、eard with the ear close to the speech sound source, such as in ear speakers specified in IEC 60268-7. This International Standard considers only the audibility of speech and not the process of speech understanding.This International Standard does not specify the sound pressure levels of spoken annou
40、ncements presented in emergency situations such as signals for fire alarms, gas leakage, and crime prevention; those are covered in ISO 7240-16 and ISO 7240-19. This International Standard does not specify the sound pressure levels of spoken announcements in automobiles; those are covered in ISO 150
41、06.NOTE 1 A spoken announcement presented in a repetitive manner from a product such as electronic home appliance is presumed to be heard as an auditory sign but not as a message and is therefore usable with a lower sound pressure level of the spoken announcement than this International Standard spe
42、cifies.NOTE 2 It is known that the word recognition performance of native speakers of the language of the announcement is better than that of non-native speakers.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for
43、its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.INTERNATIONAL STANDARD ISO 24504:2014(E) ISO 2014 All rights reserved 1BS EN ISO 24504:2016ISO 24504:2014(E)ISO 389-1, Acous
44、tics Reference zero for the calibration of audiometric equipment Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphonesISO 1996-1, Acoustics Description, measurement and assessment of environmental noise Part 1: Basic quantities and assessment procedure
45、sISO 3382-2:2008, Acoustics Measurement of room acoustic parameters Part 2: Reverberation time in ordinary roomsISO 8253-1, Acoustics Audiometric test methods Part 1: Pure-tone air and bone conduction audiometryIEC 60050-801, International Electrotechnical Vocabulary Chapter 801: Acoustics and elect
46、roacousticsIEC 60268-16, Sound system equipment Part 16: Objective rating of speech intelligibility by speech transmission indexIEC 61260, Electroacoustics Octave-band and fractional-octave-band filtersIEC 61672-1, Electroacoustics Sound level meters Part 1: Specifications3 Terms and definitionsFor
47、the purposes of this document, the terms and definitions given in IEC 60050-801, IEC 60268-16, and the following apply.3.1spoken announcementmessage presented by a live human voice, a synthesized voice, or a recorded/digitized human voice3.2ambient noisesound other than the sound to be measured as a
48、 signalNote 1 to entry: For this International Standard, spoken announcements are regarded as signals.3.3speech transmission channelacoustic and/or electro-acoustic signal path between a source of a signal and a user3.4speech transmission indexSTImetric with values 0 through 1 representing the trans
49、mission quality of speech with respect to speech intelligibility by a speech transmission channelSOURCE: IEC 60268-163.5simplified STImetric with values 0 through 1 representing the transmission quality of speech with respect to speech intelligibility by a speech transmission channel calculated only with octave-band sound pressure level difference between the sound pressure level of spoken announcements and sound pressure level of ambient noise based on STI specified in IEC 60286-16Note 1 to entry: Simplified STI does not accoun
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