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  • RTCA DO 214 : A2013

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    AUDIO SYSTEMS CHARACTERISTICS AND MINIMUM OPERATIONAL PERFORMANCE STANDARDS FOR AIRCRAFT AUDIO SYSTEMS AND EQUIPMENT

    Available format(s):  Hardcopy

    Language(s):  English

    Published date:  18-12-2013

    Publisher:  Radio Technical Commission for Aeronautics

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

    FOREWORD
    TABLE OF CONTENTS
    1.0 PURPOSE AND SCOPE
    1.1 Introduction
    1.2 Background
    1.2.1 Noise
    1.2.2 Communicator Practices
    1.2.3 Audio Response
    1.2.4 Articulation Index
    1.2.5 Absolute (Envelope) Delay
    1.2.6 Differential Delay
    1.2.7 Overdrive
    1.2.8 Intermodulation Distortion
    1.3 System Overview
    1.3.1 Control of Microphone Input and Output Signals
    1.3.2 Cockpit Voice Recorder (CVR) Area Microphones
    1.3.3 Control of Received Audio Signlas
    1.3.4 Analysis of Problems and Possible Improvement
           Measures
    1.3.5 Long-Term Improvements
    1.4. System Characteristics - General
    1.4.1 Automatic Gain Control and Compression
    1.4.2 Sidetone Level Control
    1.4.3 Transmission Bandwidth
    1.4.4 Reduction of Distortion
    1.5 Audio Systems Interface Goals
    1.5.1 General Notes
    1.5.2 Microphone Input Circuits
    1.5.3 Microphone Emulation Output
    1.5.4 PA, Receiver, and Interphone Outputs to Audio
           System
    1.5.5 Interphone, Headphone and Handset Amplifier
           Outputs from Audio System
    1.5.6 Audio Selector Panel and Audio Control
           Panel/Audio Management Unit Input
    1.5.7 CVR Output from Audio System
    1.5.8
    1.5.9 Speaker Output from Audio System
    1.6 Assumptions
    1.7 Software Considerations
    1.8 Test Procedures
    1.9 Definitions of Terms
    2.0 EQUIPMENT PERFORMANCE REQUIREMENTS AND TEST
           PROCEDURES
    2.1.1 Airworthiness
    2.1.2 Intended Function
    2.1.3 Federal Communications Commission Rules
    2.1.4 Fire Protection
    2.1.5 Operation of Controls
    2.1.6 Accessibility of Controls
    2.1.7 Effects of Test
    2.1.8 Applicability of Tests to Equipment
    2.1.9 Test Equipment
    2.2 Performance Requirements - Aircraft Microphones
           (Except for Carbon)
    2.2.1 Frequency Response
    2.2.2 Distortion
    2.2.3 Sensitivity
    2.2.4 Noise Level - Microphones, Except CVR Area
           Microphones
    2.2.5 Polar Response (CVR Area Microphones)
    2.2.6 CVR Microphone Polarity
    2.2.7 Insulation Resistance
    2.2.8 Microphone Cord
    2.2.9 Push-to-Talk Switch
    2.2.10 Microphone Drop Resistance - Except CVR Area
           Microphones
    2.2.11 Headset/Handset Isolation
    2.3 Performance Requirements - Aircraft Headsets,
           Handsets and Loudspeakers
    2.3.1 Frequency Response
    2.3.2 Distortion
    2.3.3 Sensitivity
    2.3.4 Impedance
    2.3.5 Overload
    2.3.6 Power Handling Rating (Loudspeakers)
    2.3.7 Insulation Resistance
    2.3.8 Headset and Handset Cord
    2.3.9 Headset or Handset Drop Resistance
    2.3.10 Acoustic Quality
    2.3.11 Speaker Polarity
    2.3.12 Headsets and Handsets with Active Circuits
    2.4 Performance Requirements - Audio System
    2.4.1 Rated Output Power
    2.4.2 Audio Frequency Characteristics
    2.4.3 Distortion Characteristics
    2.4.4 Impedance Characteristics
    2.4.5 Volume Controls
    2.4.6 Output Regulation
    2.4.7 Coupling Between Audio Circuits - Crosstalk
    2.4.8 Compression
    2.4.9 Stability and Short Circuit
    2.4.10 Intermodulation Distortion
    2.4.11 Audio Noise Level
    2.4.12 System Polarity (non-delay phase inversion)
    2.4.13 Delays
    2.4.14 Overdrive
    2.4.15 Listening Test
    2.5 Equipment Performance - Environmental Conditions
    2.5.1 Temperature and Altitude Tests
    2.5.2 Temperature Variation Test
    2.5.3 Humidity Test
    2.5.4 Shock Tests
    2.5.5 Vibration Tests
    2.5.6 Magnetic Effect Test
    2.5.7 Power Input Tests
    2.5.8 Voltage Spike Conducted Test
    2.5.9 Audio Frequency Conducted Susceptibility Test
    2.5.10 Induced Signal Susceptibility Test
    2.5.11 Radio Frequency Susceptibility Test (Radiated and
           Conducted)
    2.5.12 Emission of Radio Frequency Energy Test
    2.5.13 Lightning Induced Transient Susceptibility Test
    2.5.14 Final Distortion Test
    2.5.15 Push-to-Talk Switch Life
    2.6 Test Procedures - Aircraft Microphones
    2.6.1 Conditions of Test
    2.6.2 Detailed Test Procedures
    2.7 Test Procedures - Aircraft Headsets, Handsets and
           Loudspeakers
    2.7.1 Conditions of Test
    2.7.2 Detailed Test Procedures
    2.8 Test Procedures
    2.8.1 Conditions of Test
    2.8.2 Detailed Test Procedures
    3.0 INSTALLED EQUIPMENT PERFORMANCE
    3.1 Equipment Installation
    3.1.1 Accessibility
    3.1.2 Aircraft Environment
    3.1.3 Display Visibility
    3.1.4 Dynamic Response
    3.1.5 Failure Protection
    3.1.6 Interference Effects
    3.1.7 Inadvertent Turnoff
    3.1.8 Aircraft Power Source
    3.2 Installed Equipment Performance Requirements
    3.3 Conditions of Test
    3.3.1 Power Input
    3.3.2 Associated Equipment or Systems
    3.3.3 Environment
    3.3.4 Adjustment of Equipment
    3.3.5 Warm-up Period
    3.4 Test Procedures for Installed Equipment
           Performance
    3.4.1 Ground Test Procedures
    3.4.2 Aircraft System Communications Testing
    4.0 EQUIPMENT OPERATIONAL PERFORMANCE CHARACTERISTICS
    4.1 Required Operational Performance Requirements
    4.1.1 Power Input
    4.1.2 Equipment Operating Modes
    4.2 Test Procedures for Operational Performance
           Requirements
    4.2.1 Power Input
    4.2.2 Equipment Operating Modes
    4.2.3 Noise-Attenuating Headsets
    4.2.4 Self Test
    MEMBERSHIP
    Appendix A The Level of Audible Noise in Aircraft at
                the Pilot's Position
    Appendix B Discussion on the Determination of
                Intelligibility, Articulation Index, and
                Speech Interference Levels
    Appendix C Noise Cancellation in Microphones
    Appendix D Active Noise Reduction Handsets
    Appendix E Couplers
    Appendix F References

    Abstract - (Show below) - (Hide below)

    Describes audio systems characteristics and minimum operational performance standards for aircraft headset microphones, handset microphones (Except carbon), oxygen mask microphones, headsets, handsets, speakers, audio selector panels (ASP) and amplifiers.

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

    Committee SC-226
    Development Note Supersedes RTCA DO 170 (02/2000)
    Document Type Standard
    Publisher Radio Technical Commission for Aeronautics
    Status Current

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

    ARINC 809-3 : 2014 3GCN - SEAT DISTRIBUTION SYSTEM
    ARINC 538C : 2014 HANDHELD MICROPHONE AND BOOM MICROPHONE
    ARINC 808 : 2010 3GCN - CABIN DISTRIBUTION SYSTEM
    ARINC 628-4C : 2005 CABIN EQUIPMENT INTERFACES (CEI) - PART 4C: CABIN MANAGEMENT AND ENTERTAINMENT SYSTEM - CABIN DISTRIBUTION SYSTEM - 2[ND] GENERATION - DAISY CHAIN
    ARINC 535B-1 : 2016 LIGHTWEIGHT HEADSET AND BOOM MICROPHONE
    ARINC 628P2-9:2017 CABIN EQUIPMENT INTERFACES - PART 2: CABIN MANAGEMENT AND ENTERTAINMENT SYSTEMS - SEAT INTERFACES
    ARINC 628P4A-3: 2005 CABIN EQUIPMENT INTERFACES - PART 4A: CABIN MANAGEMENT AND ENTERTAINMENT SYSTEM - CABIN DISTRIBUTION SYSTEM - DAISY CHAIN
    ARINC 832 : 2016 CABIN EQUIPMENT INTERFACES, 4GCN CABIN MANAGEMENT AND ENTERTAINMENT SYSTEM, CABIN DISTRIBUTION SYSTEM
    ARINC 768-2 : 2011 INTEGRATED SURVEILLANCE SYSTEM (ISS)
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