Core upgrade contents of the standard: First, comprehensively tightened noise limits, reducing the operating noise limit in passenger elevator cars from 55dB(A) to 50dB(A), and the operating noise limit for escalators from 65dB(A) to 60dB(A); Second, unified and standardized measurement methods, unifying the measurement conditions, measurement positions, measurement instruments and data processing methods for noise from lifts, escalators and moving walks; Third, scientific evaluation standards, adopting the equivalent continuous A-weighted sound level as the noise evaluation index, comprehensively considering the impact of noise of different frequencies on the human body; Fourth, new requirements for intelligent noise reduction systems, adding technical requirements and test methods for elevator intelligent noise reduction systems, encouraging enterprises to research and develop and apply advanced noise reduction technologies; Fifth, clear acceptance standards, stipulating the acceptance standards and judgment methods for noise from lifts, escalators and moving walks.