We noticed you’re not on the correct regional site. Switch to our AMERICAS site for the best experience.
  • BS 6840-9(1987) : 1987

    Current The latest, up-to-date edition.
    Add to Watchlist
    This Standard has been added successfully to your Watchlist
    Please visit My Watchlist to see all standards that you are watching.
    Please log in or to add this standard to your Watchlist.
    We could not add this standard to your Watchlist.
    Please retry or contact support for assistance.
    We could not add this standard to your Watchlist.
    Please retry or contact support for assistance.
    You have already added this standard to your Watchlist.
    Visit My Watchlist to view the full list.

    SOUND SYSTEM EQUIPMENT - METHODS FOR SPECIFYING AND MEASURING THE CHARACTERISTICS OF ARTIFICIAL REVERBERATION, TIME DELAY AND FREQUENCY SHIFT EQUIPMENT

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  01-01-1987

    Publisher:  British Standards Institution

    Add to Watchlist

    Add To Cart

    Table of Contents - (Show below) - (Hide below)

    National foreword
    Committees responsible
    1. Scope
    2. Object
    Chapter I: Conditions for specifications and measurement
    3. Conditions
    3.1 Conditions for specification
    3.2 Rated conditions and normal working conditions
    3.3 Other conditions
    4. General
    4.1 General
    4.2 General characterization of the devices
    4.3 Comparison between characteristics of the devices
         and those of the amplifier
    Chapter II: Characteristics to be specified and relevant
                methods of measurement
    Section One - Artificial reverberation equipment
    5. General
    5.1 Definition of reverberation
    5.2 Object
    5.3 General characteristics
    5.4 Special characteristics
    6. Reverberation time
    6.1 Characteristic to be specified
    7. Various kinds of reverberation time
    7.1 Initial reverberation time
    7.2 Ultimate reverberation time
    7.3 Method of measurement
    8. Linearity
    8.1 Characteristic to be specified
    9. Frequency response
    9.1 Characteristic to be specified
    9.2 Method of measurement
    10. Initial time delay
    10.1 Characteristic to be specified
    10.2 Method of measurement
    11. Additional characteristics
    11.1 General
    11.2 Ambient acoustical noise
    11.3 Safe life expectancy
    12. General
    12.1 Types of devices
    12.2 General characteristics
    12.3 Special characteristics
    13. Delay time
    13.1 Characteristic to be specified
    13.2 Method of measurement
    14. Echo
    14.1 General
    15. Echo time
    15.1 Characteristic to be specified
    16. Ambient acoustical noise
    17. Safe life expectancy
    Section Three - Frequency shift devices
    18. General
    18.1 General characteristics
    18.2 Special characteristic
    18.3 Characteristic to be specified
    18.4 Method of measurement

    Abstract - (Show below) - (Hide below)

    Describes devices to give reverberation, time delay and frequency shift to signals of an acoustical origin. It covers the types of devices commonly employed to achieve special effects in sound recording, broadcasting and public-address systems. Covers definition of reverberation, object, general characteristics, special characteristics, reverberation time, various kinds of reverberation time, linearity, frequency response, initial time delay, additional characteristics, echo, echo time, ambient acoustical noise and safe life expectancy.

    General Product Information - (Show below) - (Hide below)

    Committee EPL/100
    Development Note Also numbered as IEC 60268-9 Supersedes 75/26725 DC and BS 5428-8(1979) (09/2005)
    Document Type Standard
    Publisher British Standards Institution
    Status Current
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS 6259(2015) : 2015 CODE OF PRACTICE FOR THE DESIGN, PLANNING, INSTALLATION, TESTING AND MAINTENANCE OF SOUND SYSTEMS
    13/30218906 DC : 0 BS 6259 - CODE OF PRACTICE FOR THE DESIGN, PLANNING, INSTALLATION, TESTING AND MAINTENANCE OF SOUND SYSTEMS
    BS 6259:2015 CODE OF PRACTICE FOR THE DESIGN, PLANNING, INSTALLATION, TESTING AND MAINTENANCE OF SOUND SYSTEMS

    Standards Referencing This Book - (Show below) - (Hide below)

    BS 5428-2(1979) : 1979 METHODS FOR SPECIFYING AND MEASURING THE CHARACTERISTICS OF SOUND SYSTEM EQUIPMENT - AMPLIFIERS
    BS 5428-11(1977) : 1977 MECHANICAL DESIGN FEATURES - LOUDSPEAKERS
    BS 6840-1(1987) : 1987 SOUND SYSTEM EQUIPMENT - METHODS FOR SPECIFYING AND MEASURING GENERAL CHARACTERISTICS USED FOR EQUIPMENT PERFORMANCE
    BS 2475:1964 SPECIFICATION FOR OCTAVE AND ONE THIRD OCTAVE BAND PASS FILTERS
    BS 6288-4(1987) : 1987 AMD 8396 MAGNETIC TAPE SOUND RECORDING AND REPRODUCING SYSTEMS - METHODS FOR MEASURING THE MECHANICAL CHARACTERISTICS OF MAGNETIC TAPE FOR ANALOGUE RECORDING
    • Access your standards online with a subscription

      Features

      • Simple online access to standards, technical information and regulations
      • Critical updates of standards and customisable alerts and notifications
      • Multi - user online standards collection: secure, flexibile and cost effective