中华人民共和国国家标准
NATIONAL
STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 44804-2024
Acoustics - Statistical distribution of hearing thresholds of normal otologists aged 18 to 25 under free field conditions 声学-自由场条件下18岁至25岁耳科正常人听力阈值的统计分布
Issued Date:2024/10/26
Implemented Date:2025/5/1
Issued by:
The Standardization Administration of the People's Republic of China