It sounds like an air raid siren.

这听起来像是空袭警报。

《柯林斯英汉双解大词典》

On the backseat, the thing in the basket began to cry, like the air raid siren announcing the birth of a new life.

车后座上那个篮子里的东西开始哭起来，就像是宣布新生命诞生的那种空袭警报。

youdao

The air-raid siren screamed through the whole town.

空袭警报在整个城镇中尖叫。

youdao

The move was first suggested ahead of the dismantling of the island's air raid siren system in 2010.

BBC: Jonathan Le Tocq

In which case a recording of an air raid siren would do it.

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