GB15742-2019

Performance requirements and test methods of horn for motor vehicles

机动车用喇叭的性能要求及试验方法

GB 15742-2019은(는) 현행 중국 강제 국가 표준입니다: Performance requirements and test methods of horn for motor vehicles. 산업: 전자. 주제: 제품 안전. 시행일: 2020년 1월 1일.

적용 여부는 제품 범위, 인증 경로, 주관 당국 공고, 전환 규정에 따라 달라집니다. 컴플라이언스 판단에 사용하기 전에 번역을 의뢰하거나 공식 출처를 확인하세요.

컴플라이언스 개요

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적용 범위

This standard applies to the performance requirements and testing methods for electric and pneumatic horns installed on M, N, and L category motor vehicles. It specifically covers passenger cars, commercial vehicles, and various motorcycles, including the newly added L1 and L2 category light motorcycles. Manufacturers must ensure their horn designs comply with these updated regulations before entering the Chinese automotive market.

기술 요구 사항

The standard mandates that horns must emit a continuous and uniform sound, with pneumatic types reaching their specified sound pressure level within 0.2 seconds of activation. It establishes strict A-weighted sound pressure level limits measured at a distance of 2 meters, with varying maximum and minimum thresholds depending on the vehicle type, such as light motorcycles versus M and N category vehicles. For frequency characteristics, the standard dictates that the total sound pressure level within the 1800Hz to 3550Hz frequency band must exceed the sound pressure level of any individual component above 3550Hz. Multi-tone horns must meet these spectral requirements both when individual units operate independently and when all units function simultaneously. Additionally, the standard outlines rigorous endurance and durability requirements, specifying a minimum number of operational cycles (e.g., 10,000 for light motorcycles, 50,000 for larger vehicles). Post-endurance testing allows for a maximum 5dB(A) drop in sound pressure level, provided other acoustic criteria are still met. During the endurance test, no adjustments to the horn are permitted.

시험 방법

Testing must be conducted in an anechoic chamber, semi-anechoic room, or an open field (as defined in the normative appendix), utilizing Class 1 precision sound level meters compliant with GB/T 3785.1. The standard details specific bench test setups, requiring the horn to be mounted on a metal base weighing at least 10 times the horn's mass, with the microphone positioned 2 meters away. Furthermore, it outlines vehicle-mounted measurement procedures, where the sound pressure level is recorded 7 meters in front of the vehicle on a flat surface to ensure real-world compliance.

자주 묻는 질문

What products are regulated under GB 15742-2019?

GB 15742-2019 applies to electric and pneumatic horns installed on M, N, and L category motor vehicles, which includes light motorcycles (L1 and L2) and motorcycles with a power output of less than or equal to 7kW.

Are there any significant updates from the previous GB 15742-2001 version?

The updated standard expands the scope to include L1 and L2 category light motorcycles, introduces specific sound pressure level limits for them, and modifies the endurance test method by strictly prohibiting any adjustment of the horn during testing. The minimum vehicle sound pressure level for M, N vehicles and motorcycles over 7kW was also reduced from 93dB(A) to 87dB(A).

How does GB 15742-2019 relate to international standards?

The standard references GB/T 3785.1 (replacing IEC 651) for sound level meters and GB/T 3241 (replacing IEC 225) for octave and fractional-octave filters, aligning the testing instrumentation with updated domestic electroacoustic standards.

The summary above provides a high-level overview of GB 15742-2019. To ensure complete compliance for your motor vehicle horns entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 15742-2019 today to access all detailed parameters, tables, and testing procedures.

적용 참고 사항

유형: 안전
CCS: T36
ICS: 43.040.10
주관 부처: Ministry of Industry and Information Technology
기술 위원회: Ministry of Industry and Information Technology