1) weighted equivalent continuous perceive noise level (L_(WECPN))
计权等效连续感觉噪声级(L_(WECPN))
2) weighted equivalent continuous perceive noise level
计权等效连续感觉噪声级
1.
The weighted equivalent continuous perceive noise level L WECPN is adopted as airport noise rating parameters,moreover,it combines the topography,scheduled flight,airport types and departure or approach flight paths etc,and computes and draws the noise contours.
采用计权等效连续感觉噪声级LWECPN作为机场噪声评价参数,具体结合机场及周围地区的地形、航班、机种及飞机起降航迹等计算并绘出机场周围地区的等声级噪声暴露图。
2.
This paper adopts weighted equivalent continuous perceive noise level as airport noise rating paramenters,moreover,it combines the topography,scheduled flight,airport types and departure or approach flight paths,etc,and it computes and draws the noise contours.
本文采用计权等效连续感觉噪声级 LWECPN作为机场噪声评价参数 ,具体结合机场及周围地区的地形、航班、机种及飞机起降航迹等计算并绘出机场周围地区的等声级噪声暴露图 。
3) weighted equivalent continous perceive noise level(L_(WECPN))
计权等效注续感觉噪声级
4) the equivalent noise grade in succession (Leq)
连续等效噪声级(Leq)
6) Effective Perceived Noise Level(EPNL)
有效感觉噪声级
1.
In this paper,the Effective Perceived Noise Level(EPNL) is adopted for a single flight event and the Weighted Equivalent Continuous Perceived Noise Level(WECPNL) is used for many flight events in a period of time.
采用有效感觉噪声级Ｌｅｐｎ作为单个事件的评价量，用计权等效连续感觉噪声级Ｌｗｅｃｐｎ作为一段时间内多个事件的评价量，介绍了机场环境噪声影响预测的完整程序和方法。
补充资料：噪声温度计（noisethermometer）
噪声温度计（noisethermometer）
它是一种测量热力学温度的基准温度计。带电载流子的无规则布朗运动，在热平衡的电阻两端产生涨落的电动势，称为热激发的噪声，该噪声电压〈Vn2〉当`kT\gt\gthv`时可表示为
〈Vn2〉=4RkTΔv
其中k为玻尔兹曼常数，Δv为该涨落电压的频带宽度。通常在低温下〈Vn2〉很小，一般放大器的输入噪声大于〈Vn2〉且是可变的，影响了测量。但SQUID问世后，这一测量已成为可能，约瑟夫森结辐射的频率与通过结的电压有关，电压涨落将影响结输出的微波频率，只要通过频率的测量就可决定〈Vn2〉，而频率的测量精度是非常高的，这决定了噪声温度计可以精确地测定热力学温度T。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条