ISO 15006:2011

Overview

ISO 15006:2011 - Road vehicles: Ergonomic aspects of transport information and control systems - Specifications for in-vehicle auditory presentation - defines ergonomic requirements and recommendations for presenting auditory information (speech and sounds) from Transport Information and Control Systems (TICS). The standard focuses on in-vehicle auditory displays used primarily while the vehicle is in motion and aims to maximize signal intelligibility and utility while preventing auditory or mental overload.

Key topics and technical requirements

• Frequency range: Recommended spectrum for in-vehicle auditory signals is 200 Hz to 8 000 Hz; main tonal components should lie between 400 Hz and 2 000 Hz to mitigate age-related hearing loss.
• Signal-to-noise ratio (SNR): For minimum audibility in noisy environments, the masked specific loudness SNR at the main tonal component shall be greater than 1.3 (Annex A procedure).
• Loudness measurement: Loudness and masked specific loudness are measured per the method in Annex A (references DIN 45631 / ISO 532); the standard addresses stationary signals (duration > 0.2 s).
• Signal levels & appropriateness: Balance audibility against comfort and startle risk; avoid excessive, unexpected, or abruptly ramped sounds. Upper limits should prevent driver startle and hearing damage.
• Timing and dynamics: For critical/warning sounds, time from onset to full loudness should be less than ~30 ms (provided no startle risk).
• Temporal classification: Signals are classified by required driver response time:
  • Short-term: 0–3 s
  • Medium-term: 3–10 s
  • Longer-term: >10 s
• Priority and safety warnings: Time-critical safety warnings always have temporal priority over non-safety signals. Redundancy (e.g., visual + auditory) is recommended for critical messages.
• Coding: Supports speech, non-speech tonal signals, or combinations. Tonal signals should be limited in number and designed for distinguishability and comprehensibility.

Applications and who uses this standard

ISO 15006 is practical for:

• Automotive HMI and ergonomics engineers
• In-vehicle audio and infotainment designers
• ADAS and safety system developers (warning/event signaling)
• OEMs and Tier-1 suppliers for TICS integration
• Test laboratories and human factors researchers validating in-vehicle auditory performance Use cases include alarm/warning design, navigation voice prompts, collision-avoidance alerts, in-cab notification systems, and human factors compliance testing.

Related standards

• ISO 532 (loudness calculation methods)
• ISO 5128:1980 (measurement of noise inside motor vehicles)
• ISO/TS 16951 (procedures for determining message priority in TICS)
• DIN 45631 (implementation details for loudness calculations)

Keywords naturally integrated: ISO 15006, in-vehicle auditory presentation, TICS, auditory signals, SNR, loudness, tonal signals, speech coding, vehicle ergonomics, safety warnings.