在野外这种干扰比较小，但是在城市就不见得了(城市往往是这种隧道的起点和终点)，众多的广播电台在诸多频段上不断地发出很大的噪声干扰，这种过滤手段就显得相当重要了。

In the wilderness such interference is rare, but in cities (where tunnels often start and finish) radio stations constantly blare out noise on many frequencies, making such filtering essential.

youdao

是的，街道上很大的音乐声，电车，汽车发出的噪声，电话铃声都是我不能忍的噪音。

Yes, Loud music on the street and the noise made by cars, trams and phone calls are all noise I can't stand.

youdao