| 1. | Regulation on noise levels on board sea - going ships
海洋船舶噪声级规定 |
| 2. | Regulation on noise levels on board inland ships
内河船舶噪声级规定 |
| 3. | Noise level measurement in sound systems
音响系统中的噪声级测量 |
| 4. | Test code for the determination of airborne noise level of hydraulic pumps
液压泵空气传声噪声级测定规范 |
| 5. | Noise level analyzer
噪声级分析仪 |
| 6. | Ambient noise level
环境噪声级 |
| 7. | Tnl : total noise level
总噪声级 |
| 8. | Hydraulic fluid power . test code for determination of airborne noise levels . part 1 : pumps
液压传动.气载噪声级测定试验规程.第1部分:泵 |
| 9. | Cinematography - background acoustic noise levels in the theatres , review rooms and dubbing rooms
电影.影院审片室及混录棚的背景噪声级 |
| 10. | Hydraulic fluid power . test code for determination of airborne noise levels . part 2 : motors
液压传动.气载噪声级测定试验规程.第2部分:电动机 |
