Core Points - Hangzhou has issued a notice to strengthen noise management during the 2025 high school entrance examinations and other special periods to ensure a quiet environment for students [1][2] - The notice prohibits all construction work in urban areas during nighttime from June 1 to June 10, June 15 to June 22, and December 31, 2025, to January 8, 2026, except for emergency repairs [1] - Specific dates for the high school entrance exams (June 7-10), middle school entrance exams (June 21-22), and other related examination days have been outlined, during which noise-generating activities are banned near examination sites [1] Regulations and Compliance - All units and individuals are required to comply with noise pollution prevention laws and the notice, actively cooperating with management departments to prevent noise interference with students [2] - The notice will take effect from May 26, and citizens can report violations to designated public service numbers [2]

Group 1 - The article discusses the implementation of the new national standard "Residential Project Specification" starting May 1, which aims to improve sound insulation performance in residential buildings, aligning with international standards [1][4] - The new standard increases the sound insulation requirements for walls and floors in new residential buildings, specifically enhancing airborne sound insulation and impact sound insulation [4][6] - The article highlights the various sources of noise in residential areas, categorizing them into external noise sources and internal noise generated by activities or equipment within the building [2][4] Group 2 - According to the new standard, the airborne sound insulation performance between bedrooms and adjacent units has been raised from 45 decibels to 50 decibels, while the impact sound insulation performance has been improved from a maximum of 75 decibels to 65 decibels [4][6] - The article emphasizes the importance of professional intervention for sound insulation modifications in existing buildings to avoid compromising structural safety [6][7] - Research teams are actively developing new materials and products to meet the updated standards, including low-cost, high-performance sound insulation solutions that exceed the new requirements by 10 decibels [7]