noise index meaning in English

噪声指数

With regard to the environment , there was a decline in the air and noise index
环境方面，本港的空气及噪音污染比前一年差。
It admits of no delay to develop high stability crystal oscillator and enhance its phase noise index to reduce the effect of jitter to the performance of the whole system
研制高稳定晶体振荡器,提高相位噪声指标、减少抖动对整体性能的影响,已经成为刻不容缓的任务。
The noise index should be definite , and the problem of noise integrating phenomenon with the indoor equipments should be considered . the improper units should have the noise elimination measure
建议明确噪声指标，须考虑与室内设备的噪声叠加问题，不符合要求的机组、空调通风系统必须有消声处理措施。
Proper arrangement of them significantly reduces the energy consumed and noise level and ensures the input power and noise index , solves the problem of insufficient air volume supplied , and improves the indoor thermal comfort effectively
通过对这些部件的合理布置，大幅度降低机组能耗及噪声，保证了产品输入功率及噪声指标，解决了传统盘管在实际运行时风量小的问题，有效提高了空调房间的舒适性。