ISO 6969:2004/Amd 1:2021

Overview

ISO 6969:2004/Amd 1:2021 is an important international standard issued by the International Organization for Standardization (ISO) that focuses on road vehicle sound signalling devices. This amendment updates the tests conducted after mounting sound signalling devices on the vehicle, ensuring their effectiveness and compliance with safety requirements. It is a critical reference for manufacturers and testers of vehicle auditory warning systems, contributing to improved road safety and regulatory compliance.

The amendment clarifies testing procedures and modifies specific test parameters such as allowable sound levels and microphone positioning criteria, enhancing precision in evaluating the performance of sound signalling devices once installed on road vehicles.

Key Topics

• Sound signalling device testing: Defines methods to verify the acoustic performance of horns and other signalling devices after being mounted on vehicles.
• Microphone positioning: Adds important notes on the positioning of microphones for sound level measurements, referencing ECE Regulation 28, Amendment 5:2018, Annex 5 for microphone placement variety.
• Sound pressure levels: Adjusts required sound levels during testing, notably reducing the minimum sound level from 93 dB to 87 dB to align with updated safety and functional standards.
• Vehicle mounting effects: Ensures that tests account for the actual conditions of devices installed on vehicles rather than isolated components, fostering realistic performance verification.
• Standard compliance: Provides a framework for manufacturers and testing organizations to comply with international norms on vehicle auditory signals.

Applications

ISO 6969:2004/Amd 1:2021 finds practical application in several areas, including:

• Automotive manufacturing: Assists vehicle manufacturers in designing, testing, and validating sound signalling devices such as horns to meet international standards.
• Component testing labs: Establishes protocols for laboratories conducting post-mounting acoustic tests, enabling consistent and reliable measurement results.
• Vehicle safety compliance: Supports regulatory bodies in enforcing standard sound levels and device performance to maintain road safety.
• Product certification: Facilitates certification processes by defining clear test methods that confirm adherence to sound signalling device requirements after installation.
• Research and development: Provides insights for automotive engineers developing improved horn systems and other sound signalling technologies.

Related Standards

This amendment works in conjunction with other standards and regulations aimed at regulating vehicle sound signalling devices, including:

• ECE Regulation 28 (Amendment 5:2018): Provides detailed microphone positioning standards referenced in this amendment.
• ISO/IEC Directives Parts 1 and 2: Govern the editorial and procedural rules under which this document was prepared and maintained.
• ISO 7637 series: Addresses electrical disturbances related to automotive components, relevant for understanding broader vehicle device compliance.
• ISO/TC 22 standards: Series of standards developed by the ISO Technical Committee for road vehicles including electrical and electronic systems.

Adhering to ISO 6969:2004/Amd 1:2021 ensures manufacturers and testing bodies maintain high quality and consistency in vehicle sound signalling device performance, contributing to improved safety on roads worldwide.

Keywords: ISO 6969, sound signalling devices, road vehicles, vehicle horn testing, automotive acoustic standards, vehicle safety compliance, sound level testing, microphone positioning, ECE Regulation 28, vehicle auditory warnings.