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See Chinese contents: GB/T 37153-2018 GB/T 37153-2018: Acoustic vehicle alerting system of electric vehicles running at low speed
This Standard specifies requirements and test methods for vehicle speed range, sound level limit, frequency requirements, sound type, and pause switch of acoustic vehicle alerting system of electric vehicles running at low speed. This Standard is applicable to pure electric vehicles of the Category-M1 and N1 categories, hybrid electric vehicles with pure electric driving modes, and fuel cell electric vehicles.
