| 1. | The distance between the acoustic-emission source and the receiving transducer, and the background noise level are primary factors in selecting a particular frequency band .
声发射源与接收讯号传感器间的距离以及环境噪声的电平是选择频带的主要依据。 |
| 2. | Shipbuilding - measurement of noise level on board vessels machinery part
造船.船上容器 |
| 3. | The noise level is just higher than the noise limit
该处的噪音水平略超出噪音限制标准。 |
| 4. | Regulation on noise levels on board sea - going ships
海洋船舶噪声级规定 |
| 5. | Regulation on noise levels on board inland ships
内河船舶噪声级规定 |
| 6. | Noise level measurement in sound systems
音响系统中的噪声级测量 |
| 7. | Maximum permissible ambient noise levels for audiometric test rooms
试听室最大可允许的环境噪声等级 |
| 8. | 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 |
| 9. | Making complaint of excessive noise level
投诉过量噪音 |
| 10. | Audible noise level : meets the 70 db noise exposure limit
-可听到的噪音水平：符合70分贝a噪音暴露限制要求 |
