What national standards do polyester fiber sound-absorbing panels comply with?

Polyester fiber decorative sound-absorbing panels comply with the building materials industry standard JC/T 2704-2022. This standard was released on September 30, 2022, and came into effect on April 1, 2023. It specifies the product classification, specifications, technical requirements, test methods, and inspection rules. Based on sound absorption, they are divided into three levels: Level 1, Level 2, and Level 3.