1 Scope
2 References
3 Definitions
3.1 Terms defined
elsewhere
3.2 Terms defined in
this Recommendation
4 Abbreviations and acronyms
5 Conventions
6 Safe listening:
Introduction
6.1 Background
6.2 Personal audio
system
7 Damage risk criteria
7.1 Operational modes
7.2 Uncertainty in
dose estimate
8 Measurement methods
8.1 Dosimetry
9 Sensitivity range and
frequency response of headphones
10 Profiles
11 Health communication
11.1 Purpose of
including health communication as part of the standards for safe listening
personal audio systems
11.2 Key
recommendations for communication as part of standards for safe listening
devices
12 Ambient noise control
12.1 Passive
attenuation of the background noise
12.2 Active noise
reduction of background noise
12.3 Benefits of
noise-isolating earphones
12.4 Safety concerns
associated with noise-isolating earphones
13 Volume control
13.1 Volume limiting
13.2 Parental control
14 Guidance on ancillary
concerns
Appendix I – Status report
Appendix II – Dose estimation functionality for implementation in a
personal audio system
II.1 Introduction
II.2 Main related
standards
II.3 Definition of dose
in the context of acoustic dosimetry
II.4 Weighting of
different frequencies
II.5 Signal capture
point in a personal audio system (PAS)
II.6 Handling of left
and right channels
II.7 Dosimeter
implementation example
II.8 Handling of
computational complexity
II.9 Handling of dose
over days and weeks
II.10 Case of unknown
headphone characteristics
II.11 Alternative audio
signal capture point
II.12 Testing of
dosimeter functionality
II.13 Uncertainties
Appendix III – European Standard EN 71-1 for toys
Appendix IV – "Music" versus "noise"
Appendix V – On stapedius muscle reflex
Appendix VI – Consideration of recovery phase
Appendix VII – Example of health communication
VII.1 Recommendations to
develop warnings and cues for action messages for device interfaces
VII.2 Suggested flow (an
example) of information as part of standards for safe listening devices
VII.3 Example of how the
information on listening parameters can be conveyed to the user
VII.4 Warnings and cues
for actions
Bibliography