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  • BSI
    BS 6840-17:1991, IEC 60268-17:1990 Sound system equipment - Methods for specifying and measuring the characteristics of standard volume indicators
    Edition: 1991
    $266.02
    / user per year

Description of BS 6840-17:1991 1991

This standard gives the characteristics to be specified, performance requirements and the relevant methods of measurement for electro-mechanical volume indicators. The concept of “volume” is a practical way of assigning a numerical value to the magnitude of electrical speech and music programme signals.

Since the response of the meter movement of such an indicator to the rapidly varying programme voltage is greatly dependent upon its dynamic characteristics, a standard for volume measurements shall therefore include a specification of these characteristics. The term “vu” (pronounced “vee-you” and written with lower case letters) is used to express volume in terms of vu above or below a specified reference level.

This standard does not deal with peak programme level meters which are the subject of IEC 268-10.



Defines the characteristics, methods of measurement, scale colours and standard scale markings, and requirements for a built-in or external attenuator for VU indicators (VU-meters) for use in recording studios and broadcast control rooms.

Standard NumberBS 6840-17:1991, IEC 60268-17:1990
TitleSound system equipment - Methods for specifying and measuring the characteristics of standard volume indicators
StatusDefinitive
Publication Date1991-04-30
Identical National Standard OfIEC 60268-17:1990
DescriptorsCircuits, Acoustic measurement, Instrument scales, Audio systems, Performance, Audio equipment, Input impedance, Sound-level meters, Signal distortion, Colour, Frequency response, Response time, Acoustic equipment, Test equipment, Volume (sound), Sensitivity, Attenuation
ICS33.160.30 Audio systems
CommitteeEPL/100
ISBN0 580 19533 3
PublisherBSI
Pages14

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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