忙音

máng yīn sāi kǒng

忙音塞孔

busy-back jack

máng yīn xìn hào

忙音信号

busy signal

wǒ yī zhí tīng dào máng yīn

我一直听到忙音。

I keep getting a busy signal.

xiàn zài rén men dǎ diàn huà shí rú guǒ tīng dào de shì máng yīn jiù huì zhuā kuáng

现在，人们打电话时如果听到的是忙音，就会抓狂。

Now when people call a phone and get a busy signal, they get mad.