Home / Standards / GB/T 20242-2025 GB/T 20242-2025 Active Acoustics—Measurement of real-ear acoustical performance characteristics of hearing aids 声学 助听器真耳声性能特性测量 Standard Type GBT ICS 17.140 CCS A59 Status 现行 Issue Date 2025-08-01 Implementation 2026-02-01 Responsible Dept 中国科学院 Drafting Unit N/A