随着该规划的实施，系统运行地区的交通事故发生率降低了90%，2100多辆老旧公交报废，噪音水平降低了3 - 10分贝。
The program also has decreased accident rates by 90 percent in the corridors where the system operates, scrapped more than 2,100 old buses, and reduced noise levels by 3-10 decibels.
通用航空公司的飞行管理系统(FMS)可以缩短飞行路径和降低闲置推力从而降低燃料消耗、排放和噪音。
Ge's flight management system (FMS) provides the ability to fly shorter flight paths and idle-thrust descents which reduces fuel consumption, thereby lowering emissions and community noise levels.
对于复合扩径管，由于奥氏体粗晶度的原因，也可以采用信号处理系统有效地降低噪音。
It may also use signal process system to decrease noise efficiently for compound expanded pipes, due to austenite rough grain size.
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