This standard specifies requirements and test methods for speed range, sound level limit, frequency requirement, sound type and pause switch, etc. of acoustic vehicle alerting system of electric vehicles running at low speed (hereinafter referred to as "acoustic vehicle alerting system").
It is applicable to pure electric vehicles of categories M1 and N1, hybrid electric vehicles with pure electric driving mode, and fuel cell electric vehicles.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB 1495 Limits and measurement methods for noise emitted by accelerating motor vehicles
GB/T 3241-2010 Electroacoustics - Octave-band and fractional-octave-band filters
GB/T 3785.1-2010 Electroacoustics - Sound level meters - Part 1: Specifications
GB/T 12534 Motor vehicles－General rules of road test method
GB/T 15173-2010 Electroacoustics - Sound calibrators
GB/T 19596 Terminology of electric vehicles
GB 50800-2012 Technical code for anechoic and semi-anechoic rooms
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 19596 and the following apply.
3.1
acoustic vehicle alerting system; AVAS
a system to give acoustic alert when the noise emitted by vehicle is below a certain value during running to efficiently deliver information to other road users
3.2
acoustic vehicle alerting system of electric vehicle running at low speed
acoustic alert emitted by the AVAS when the running speed of the electric vehicle is lower than a certain value
3.3
acoustic vehicle alerting system pause switch
device that turns on/off the acoustic alert on an electric vehicle
3.4
frequency shift
frequency change of acoustic vehicle alerting system of electric vehicle running at low speed along the change of vehicle speed
GB/T 37153-2018 The following standards are cited：
