That's the meaning of " ear splitting." " To split" something means to cut it in half.

这就是“劈耳”的意思。“劈”就是把东西切成两半。

The frequency was said to be so ear splitting that it could cause devastating and potentially lethal nerve damage.

据说这种频率震耳欲聋，可能会造成毁灭性的甚至可能致命的神经损伤。

It was almost four o'clock when I heard its distant roar swell into an ear- splitting howl of noise.

将近四点钟时， 我听到远处的轰鸣声变成了震耳欲聋的嚎叫声。