根据《机场周围飞机噪声环境标准(GB9660 - 88)》，以计权等效连续感觉噪声级LWECPN作为机场噪声评价量。

According to the standard of aircraft noise environment around Airport (GB9660-88), LWECPN (Weighted Equivalent Continuous Perceived noise Level) is selected as noise metrics.

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我们需要这些噪声，因为我们希望感觉自己是团体的一部分，所有的团体。

Noise that we want, because we want to feel part of the group. All of the groups.

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语音增强的主要目的有两个：一个是改进语音质量、消除背景噪声，使听者乐于接受、不感觉疲劳，这是一种主观度量；

It has two main aims: one is to improve the audio quality, eliminate the background noises, and make the listener feel less tired but more willing to listen, and this is a subjective measurement.

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