Subject + 响 + 了
The verb 响 (xiǎng) means "to ring," "to sound," or "to make a noise." It is used to describe phones ringing, alarms going off, or any object producing a sound, and often appears with adverbs like 突然 to indicate a sudden noise.
电话突然响了,把我吓了一跳。
diànhuà tūrán xiǎng le, bǎ wǒ xià le yī tiào.
The phone suddenly rang and startled me.
闹钟响了半天,他还是没醒。
nàozhōng xiǎng le bàntiān, tā háishì méi xǐng.
The alarm clock rang for a long time, but he still didn't wake up.
门铃响了,你去看看是谁。
ménlíng xiǎng le, nǐ qù kànkan shì shéi.
The doorbell rang — go see who it is.