Cart:
| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 4854.3-2022 |
Acoustics—Reference zero for the calibration of audiometric equipment—Part 3：Reference equivalent threshold vibratory force levels for pure tones and bone vibrators 声学 校准测听设备的基准零级 第3部分: 骨振器纯音基准等效阈振动力级 |
China National Standards Acoustics—Reference |
 English PDF |
| GB/T 4854.9-2016 |
Acoustics—Reference zero for the calibration of audiometric equipment—Part 9: Preferred test conditions for the determination of reference hearing threshold levels 声学 校准测听设备的基准零级 第9部分：确定基准听阈级的优选测试条件 |
China National Standards Acoustics—Reference |
English PDF |
| Find out:2Items | To Page of: First -Previous-Next -Last | 1 |
+86-755-25831330
