j m woodgate and associates rayleigh uk1 british standard code of practice for...

J M Woodgate and Associates J M Woodgate and Associates RAYLEIGH UKRAYLEIGH UK 11

British Standard Code of Practicefor Audio-Frequency-Inductive-

Loop-Systems (AFILS)BS 7594

John Woodgate


Standards and Codes of Standards and Codes of PracticePractice

All technological systems need defined All technological systems need defined performance characteristicsperformance characteristics Designers of loop systems:Designers of loop systems:

International standard IEC 60118-4:2006International standard IEC 60118-4:2006 Owners and operators of loop systems:Owners and operators of loop systems:

British Standard Code of Practice for AFILS British Standard Code of Practice for AFILS

(BS 7594:1993, under revision)(BS 7594:1993, under revision)


British Standard Code of Practice for British Standard Code of Practice for AFILS (BS 7594)AFILS (BS 7594)

Survey of London theatres by RNID in 1985Survey of London theatres by RNID in 1985

Most had no assistive listening system or Most had no assistive listening system or no working systemno working system

Demonstrated the need for a code of Demonstrated the need for a code of practicepractice

RNID asked British Standards Institution RNID asked British Standards Institution (BSI) to develop a Code of Practice for AFILS(BSI) to develop a Code of Practice for AFILS

BS 7594 first published in 1993BS 7594 first published in 1993

BS 7594 RevisedBS 7594 Revised

Revision to be published this year (2011)Revision to be published this year (2011)

BS 7594:1993 was re-confirmed in 1998, BS 7594:1993 was re-confirmed in 1998, but the 2006 revision of IEC 60118-4 but the 2006 revision of IEC 60118-4 prompted the revision of BS 7594;prompted the revision of BS 7594;

May be offered to IEC as an IEC Technical May be offered to IEC as an IEC Technical ReportReport



Structure of BS 7594Structure of BS 7594

BS 7594 effectively has two parts:BS 7594 effectively has two parts:

1.1. Review of the technical basis of AFILS designReview of the technical basis of AFILS design

Incorrect information had caused problemsIncorrect information had caused problems

2.2. Detailed guidance for owners and operators Detailed guidance for owners and operators

How to ensure the system is well-designed How to ensure the system is well-designed

How to keep it workingHow to keep it working

Signage and communicationSignage and communication

This presentation will focus on the 2nd partThis presentation will focus on the 2nd part


Overview of non-technical Overview of non-technical SectionsSections

Purchasers: Sections 1 and 2Purchasers: Sections 1 and 2

Owners and operators: Sections 6 Owners and operators: Sections 6 and 7and 7

Hearing aid users: Section 6Hearing aid users: Section 6


For purchasersFor purchasers

What is an audio-frequency What is an audio-frequency induction-loop system (AFILS)?induction-loop system (AFILS)?

Advantages and limitationsAdvantages and limitations

The need for specialist adviceThe need for specialist advice

The need to comply with The need to comply with performance standardsperformance standards


SignageSignage

Symbols for technical and Symbols for technical and architectural drawingsarchitectural drawings

Sign for the presence of an AFILS Sign for the presence of an AFILS (the ‘crossed-ear and T’ sign)(the ‘crossed-ear and T’ sign)

Sign for listening areas not covered Sign for listening areas not covered by the AFILS (the same sign with a by the AFILS (the same sign with a diagonal black bar)diagonal black bar)


AFILS AFILS present present

signsign


No AFILS coverage sign


How to obtain a well-designed How to obtain a well-designed AFILSAFILS

Check with an expert that an AFILS is Check with an expert that an AFILS is what is needed!what is needed!

Have the site assessed for:Have the site assessed for: adverse conditions, such as large metal adverse conditions, such as large metal

structures, moveable tiered seating, etc.structures, moveable tiered seating, etc. unusual extra costs (e.g. due to unusual extra costs (e.g. due to

protected architectural features)protected architectural features)


How to find an expertHow to find an expert

Independent consultantIndependent consultant

System manufacturerSystem manufacturer

Installation contractor (small systems)Installation contractor (small systems)

Contact details in UK for these from:Contact details in UK for these from:

Institute of Sound and Communications Institute of Sound and Communications Engineers: [email protected]: [email protected]


ContractContract

BS 7594 recommends a contract to define the BS 7594 recommends a contract to define the requirements and responsibilities of the partiesrequirements and responsibilities of the parties Possible exception: small systemsPossible exception: small systems

Contracts can prevent endless costly problems Contracts can prevent endless costly problems at later stageat later stage

Contract should specify the ‘sign-off’ criteria Contract should specify the ‘sign-off’ criteria after the system has been commissionedafter the system has been commissioned

The new BS 7594 includes model ‘sign-off’ The new BS 7594 includes model ‘sign-off’ certificates to facilitate thiscertificates to facilitate this


Information and Information and recommendations for owners recommendations for owners

and operatorsand operators Provide information to staff and Provide information to staff and

hearing-aid users. hearing-aid users. (Common failing!)(Common failing!)In addition to signage, leaflet should be In addition to signage, leaflet should be provided to give details for hearing-aid provided to give details for hearing-aid usersusers

TrainTrain operators and staff operators and staff Check the system Check the system often and regularly often and regularly

especially in multi-purpose spaces especially in multi-purpose spaces


Monitor receiverMonitor receiver BS 7594 recommends a fixed monitor receiver BS 7594 recommends a fixed monitor receiver

Like a loop listener but with a button to Like a loop listener but with a button to activate a small loudspeakeractivate a small loudspeaker

Fixed on the wall; preferably accessible to Fixed on the wall; preferably accessible to all, not only staffall, not only staff

Simple and inexpensive device but Simple and inexpensive device but unfortunately not commercially availableunfortunately not commercially available

If available and provided, anyone would be If available and provided, anyone would be able to check the system easilyable to check the system easily


Prototype Monitor receiver


Prototype Monitor receiver 2

Utilization of BS 7594Utilization of BS 7594

Main problem in UK is non-working Main problem in UK is non-working systems due to poor installation skills systems due to poor installation skills

BSI reports BS 7594 is a best seller; BSI reports BS 7594 is a best seller; bought by designers and skilled bought by designers and skilled installersinstallers

Loop advocates chant ‘IEC 60118-4 Loop advocates chant ‘IEC 60118-4 and BS 7594’ almost like a mantraand BS 7594’ almost like a mantra



How to make improvements using BS 7954

Publicize IEC 60118-4 and BS 7594 (the upcoming revised edition);

Support training for loop installers and electricians;

Introduce a certification scheme (not a simple or low-cost task)

DANGER! A ‘certifiction’ scheme!


How to obtain BS 7594

http://shop.bsigroup.com/

Buying elsewhere unlikely to be cheaper: be sure you don’t buy an older version

Most of the 1993 edition of BS 7594 is still valid, but the new edition will be available later this year (2011)


How to obtain IEC/EN 60118-4 IEC 60118-4 adopted by CENELEC

(European standards body)

English versions of 60118-4 are sold by: IEC (www.iec.ch)

standards bodies of EU countries

List of standards bodies is at:

http://en.wikipedia.org/wiki/Standards_organization


Contact InformationContact InformationBritish Standards Institution: British Standards Institution:

www.bsigroup.comwww.bsigroup.com

Institute of Sound and Communications Institute of Sound and Communications Engineers (ISCE): www.isce.org.ukEngineers (ISCE): www.isce.org.uk

Your presenter: Your presenter:

J M Woodgate and AssociatesJ M Woodgate and Associates

www.jmwa.demon.co.ukwww.jmwa.demon.co.uk

email: email: [email protected]

Feel free to email questions!Feel free to email questions!

mailto:[email protected]

j m woodgate and associates rayleigh uk1 british standard code of practice for...

Documents

systems afils bs

revision of bs

afils rnid

revision slide

revision of iec

structure of bs

code of practice rnid

operators of loop systems