QC/T 70-2014 (English Version) PDF

Scope: This standard specifies the measuring instruments, measurement conditions, measurement methods, data collection and measurement results for measuring the surface average sound pressure level in motorcycle and moped engine testing rooms. This standard applies to nois measurement of reciprocating pis on internal combustion engines (hereinafter referred to as engines) for motorcycles and mopeds.

QC/T 70-2014 Referenced Document

GB/T 1859-2000 Reciprocating internal combustion engines-Measurement of emitted airborne noise-Engineering method and survey method
GB/T 20076 Measurement methods of maximum torque and maximum net power of engines for motorcycles and mopeds*， 2021-12-31 Update
GB/T 3767-1996 Acoustics--Determination of sound power levels of noise sources using sound pressure--Engineering method in an essentially free field over a reflecting plane
GB/T 3768-1996 Acoustics--Determination of sound power levels of noise sources using sound pressure--Survey method using an enveloping measurement surface over a reflecting plane
GB/T 3785.1 Electroacoustics—Sound level meters—Part 1: Specifications*， 2023-05-23 Update
GB/T 4129 Acoustics-Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels
GB/T 5363 Method of bench test of engine for motorcycles and mopeds
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values

2014 QC/T 70-2014 Measurement method of acoustic noise for engines of motorcycles and mopeds
1993 QC/T 70-1993 Motorcycle Engine Noise Limits and Measurement Methods