BS ISO 23600-2007 Assistive products for persons with vision impairments and persons with vision and hearing impairments Acoustic and tactile signals for pedestrian traffic lights《.pdf

1、BRITISH STANDARDBS ISO 23600:2007Assistive products for persons with vision impairments and persons with vision and hearing impairments Acoustic and tactile signals for pedestrian traffic lightsICS 11.180.15; 11.180.30; 93.080.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40

2、g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 23600:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2007 BSI 2007ISBN 978 0 580 55439 1N

3、ational forewordThis British Standard is the UK implementation of ISO 23600:2007.The UK participation in its preparation was entrusted to Technical Committee CH/173, Assistive products for persons with disability.A list of organizations represented on this committee can be obtained on request to its

4、 secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsINTERNATIONA

5、LSTANDARDISO23600First edition2007-11-01Reference numberISO 23600:2007(E)Assistive products for persons with vision impairments and persons with vision and hearing impairments Acoustic and tactile signals for pedestrian traffic lightsAides fonctionnelles pour personnes ayant des dficiences visuelles

6、 et/ou des dficiences visuelles et auditives Signaux acoustiques et tactiles pour feux de circulationBS ISO 23600:2007ii iiiForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies(ISO member bodies). The work of preparing International

7、Standards is normally carried out through ISOtechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee. International organizations, governmental andnon-governmental, in liaison with ISO, also

8、take part in the work. ISO collaborates closely with the InternationalElectrotechnical 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

9、 to prepare International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as anInternational Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility t

10、hat some of the elements of this document may be the subject of patentrights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 23600 was prepared by Technical Committee ISO/TC 173, Assistive products for persons with disability.BS ISO 23600:2007ivIntroductionThe ai

11、m of this International Standard is to specify the requirements for acoustic and tactile signals forpedestrian traffic lights, for persons with vision impairments and persons with vision and hearing impairments.Persons with vision impairments and persons with vision and hearing impairments travellin

12、g alone use anumber of techniques and cues in the environment to commence a safe street crossing. Environmental soundsand cues provide timing and directional information.At an intersection that is equipped with pedestrian lights, acoustic and tactile signals provide equivalentinformation to persons

13、with vision impairments and persons with vision and hearing impairments.At an intersection that is not equipped with acoustic and tactile signals, persons with vision impairments areforced to use the sounds of vehicular traffic in order to estimate the time to start crossing a street and todetermine

14、 their direction of travel. However, the sounds of vehicular traffic are not always available and ofteninsufficient. In the case of persons with vision and hearing impairments, the majority of these people have torely on assistance. The installation of acoustic and tactile signals for pedestrian tra

15、ffic lights significantlyimproves the ability of persons with vision impairments and persons with vision and hearing impairments totravel safely and independently.Acoustic and tactile signals for pedestrian traffic lights provide persons with vision impairments and personswith vision and hearing imp

16、airments with information to know precisely when the walk initiation signal has beenactivated. They can also provide directional information and the geometry of the intersection.The specifications and installation methods of acoustic and tactile signals for pedestrian traffic lights have beendiffere

17、nt from country to country. This International Standard sets out the requirements, technical specificationsand performance criteria for acoustic and tactile signals for pedestrian traffic lights.BS ISO 23600:20071Assistive products for persons with vision impairments and persons with vision and hear

18、ing impairments Acoustic and tactile signals for pedestrian traffic lights1ScopeThis International Standard specifies requirements for acoustic and tactile signals for pedestrian traffic lights toassist in safe and independent mobility of persons with vision impairments and persons with vision and h

19、earingimpairments.It is applicable to design, installation and operation of acoustic and tactile signals for pedestrian traffic lights.It is not applicable to electromagnetic compatibility (EMC), electrical safety or operating conditions.NOTE Operating conditions can be affected by climate, shock, v

20、ibrations or other environmental factors.2 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.2.1 persons with vision impairmentspersons who are blind or who have low vision2.2 persons with vision and hearing impairmentspersons who are blind or who have

21、 low vision in combination with deafness or hearing loss2.3 acoustic orientation signalsound used to enable persons with vision impairments to recognise the presence of and to locate a push-buttonbox and/or pedestrian crosswalk2.4 walk initiation periodperiod when the display indicates that pedestri

22、ans may begin their crossing in the pedestrian crosswalk2.5 prohibited walk initiation periodperiod when the display indicates that pedestrians may not enter the pedestrian crosswalkNOTE The prohibited walk initiation period consists of two parts: the period following the walk initiation period when

23、pedestrians in the pedestrian crosswalk may continue going out of the pedestrian crosswalk and the period whenpedestrians are prohibited to enter the pedestrian crosswalk.2.6 acoustic walk initiation signalsound used to indicate to persons with vision impairments the walk initiation periodBS ISO 236

24、00:200722.7 tactile walk initiation signalvibrating or rotating device to indicate the walk initiation period to persons with vision impairments and personswith vision and hearing impairments3 General3.1 Acoustic signalsAn acoustic signal for persons with vision impairments and persons with vision a

25、nd hearing impairments canindicate:a) the presence and location of a push button;b) the location of a pedestrian crosswalk;c) the walk initiation period;d) the direction of the pedestrian crosswalk;e) the prohibited walk initiation period.3.2 Tactile signalsTactile signals for persons with vision im

26、pairments and persons with vision and hearing impairments canindicate the walk initiation period and the direction of the pedestrian crosswalk.3.3 Activation of acoustic and tactile signalsAcoustic and tactile signals can be automatically controlled or activated by a push button or a remote controld

27、evice carried by an individual.When acoustic and tactile signals are activated by a push button, activation should be indicated by tactile and/oracoustic feedback.It is important that the tactile and acoustic feedback to button activation be distinctly different from tactile andacoustic walk initiat

28、ion signals.3.4 Additional featuresTactile and/or acoustic features can provide:a) the characteristics of a pedestrian crosswalk;b) the shape of an intersection;c) the name of the intersection;d) the name of the street to be crossed.4 Requirements4.1 GeneralAcoustic and tactile signals should be use

29、d in combination to meet the needs of persons with visionimpairments and persons with vision and hearing impairments.BS ISO 23600:200734.2 Acoustic orientation signal4.2.1 Uses of acoustic orientation signalAn acoustic orientation signal is used to indicate the location of a pedestrian crosswalk, an

30、d the presence andlocation of a push button. The acoustic orientation signal may also be used to indicate the prohibited walkinitiation period.4.2.2 Repetition rateThe repetition rate of the acoustic orientation signal should be . The repetition rate shall be betweenand . If the acoustic orientation

31、 signal and acoustic walk initiation signal consist of the samesounds, the ratio between the repetition rate of the orientation signal shall be equal to or less than 0,2 times therepetition rate of the walk initiation signal.4.2.3 Audible distanceThe acoustic orientation signal should be audible at

32、minimum of and maximum of from the soundsource, unless an adjacent building is closer.4.2.4 Sound-pressure levelThe sound-pressure level of the acoustic orientation signal should be between and . The sound-pressure level of the acoustic orientation signal should be above ambient noise level. The sou

33、nd-pressurelevel of the acoustic orientation signal should not exceed above ambient noise level.4.3 Acoustic walk initiation signal4.3.1 Common requirements for acoustic walk initiation signal4.3.1.1 DurationThe acoustic walk initiation signal should remain actuated during the entire walk initiation

34、 period.4.3.1.2 Non-ambiguous acoustic signalAn acoustic walk initiation signal shall give non-ambiguous information regarding the pedestrian crosswalk towhich it applies. This can be achieved by one or more of the following:a) placement of the acoustic and tactile signal within the width of the ped

35、estrian crosswalk;b) careful control of volume of acoustic signal;c) use of a tactile signal;d) speech message.4.3.1.3 Frequency range4.3.1.3.1 Multiple frequency soundThe acoustic walk initiation signal should be composed of multiple frequencies. The multiple frequency soundshould include both high

36、 and low frequencies. The principal frequencies shall be between and .NOTE 1 Sounds having multiple peaks between and are useful for detection and localization.1,0 Hz0,5 Hz 1,2 Hz1m 5m30 dB 90 dB5dB10 dB300 Hz 3 500 Hz500 Hz 2 500 HzBS ISO 23600:20074NOTE 2 Sounds having a central frequency above ca

37、n be difficult to detect for persons with an age-relatedhearing loss.NOTE 3 In order for persons with age-related hearing loss to detect multiple frequency signals, it is necessary to havesufficient energy in the band between and .4.3.1.3.2 Single frequency soundThe frequency of a single frequency s

38、ound should be between and .4.3.2 Requirements for singly- and simultaneously-generated acoustic walk initiation signals4.3.2.1 Repetition rateThe repetition rate of the intermittent sound of the acoustic walk initiation signal shall be greater than .When sounds other than tones are used, the repeti

39、tion rate for the system shall be more than .EXAMPLE Speech or bird sounds are examples of sounds that are not tones.4.3.2.2 Audible distanceThe acoustic walk initiation signal should be audible at a minimum of from the sound source. If the acousticwalk initiation signal is used to indicate the dire

40、ction of the pedestrian crosswalk, the sound of each soundemitter should be detectable for a minimum of two-thirds the length of the pedestrian crosswalk.4.3.2.3 Sound-pressure levelThe sound-pressure level of acoustic walk initiation signals should be automatically adjusted according toambient soun

41、d-pressure level. The sound-pressure level of the acoustic walk initiation signal should be betweenand . The sound-pressure level of acoustic walk initiation signal should be above ambientnoise level. The acoustic walk initiation signal should not exceed above ambient noise level.4.3.2.4 Height of i

42、nstallationWhen the sound emitter is installed in or near the visual pedestrian signal, it should be installed to above the ground. The sound emitter may also be included in the push-button box.4.3.3 Requirements for alternately generated acoustic walk initiation signals4.3.3.1 GeneralAlternately ge

43、nerated acoustic walk initiation signals have sound emitters at each end of a pedestriancrosswalk, which emit acoustic walk initiation signals back-and-forth, to assist users in determining a walkingdirection from the beginning to the end of the pedestrian crosswalk.4.3.3.2 Repetition rateThe maximu

44、m repetition rate of sounds emitted by the sound emitters at each end of a pedestrian crosswalkshall be . The minimum silent period between sounds shall be (see Figure 1).4.3.3.3 Audible rangeThe sound of the acoustic walk initiation signal should be detectable from the entry of a pedestrian crosswa

45、lk tothe exit (see Figures 2 and 3). For a long pedestrian crosswalk at which it is difficult to detect this sound on the2 500 Hz300 Hz 1 500 Hz800 Hz 2 000 Hz2,5 Hz0,6 Hz1m30 dB 90 dB 5dB10 dB2,0 m 3,5 m1Hz 0,2 secBS ISO 23600:20075opposite side, sound of the acoustic walk initiation signal should

46、be relayed at a median island, enablingpersons to hear the sounds from all locations of the pedestrian crosswalk and enabling pedestrians to cross intwo stages to promote safety.4.3.3.4 Sound-pressure levelThe sound-pressure level of the alternately generated acoustic walk initiation signal should b

47、e between and .4.3.3.5 Height of installationSound emitters should be installed to above the ground.4.3.3.6 Sound emitter locationSound emitters should be installed at the centre of the pedestrian crosswalk width so as to facilitate guidance.KeyXtime1 sound emitter A2 sound emitter A3 signal soundab

48、Figure 1 Timing of sound emission for alternating signals45 dB100 dB2,0 m 3,5 m1,0 s min.0,2 s min.BS ISO 23600:200764.4 Tactile walk initiation signal4.4.1 DurationThe tactile walk initiation signal should remain actuated during the entire walk initiation period when thepedestrian traffic light is

49、green.4.4.2 Height of installationThe tactile walk initiation signal should be installed between and above the ground.Key1 sound emitter A2 sound emitter A3 pavement/sidewalk4 roadwayFigure 2 Audible range for alternating signal (plan view)Key1 sound emitter A2 sound emitter A3 pavement/sidewalk4 roadwayFigure 3 Audible range of alternating signal (side view)0,8 m 1,2 mBS ISO 23600:200774.4.3 Tactile direction indicatorWhen a tactile walk initiation signal is used, it shall have a tactile directi